Meaning: 'Fundamental' means something that is basic and essential, indicating that the health of children is a primary concern.

Wrong options:

• determines: Determines is a verb that means to decide or conclude something, which does not fit as it does not describe the nature of importance.
• prevented: Prevented is a past participle verb that refers to stopping something from happening, which does not grammatically fit as it does not modify 'importance.'
• removed: Removed is a past participle verb that means taken away, which does not relate to the concept of importance in this context.
• valid: Valid is an adjective that means acceptable or legitimate, but it does not convey the essential nature of importance in this context.
• progress: Progress is a noun that refers to advancement or improvement, which does not fit as it does not describe the type of importance being discussed.
• remains: Remains is a verb that indicates something continues to exist, which does not fit grammatically as it does not modify 'importance.'

Correct answer: progress

Explanation: The term 'progress' is a noun that refers to forward movement or advancement. It fits grammatically and contextually as it describes the improvements made in children's health over the past decades.

Meaning: 'Progress' means advancement or improvement in a particular area, indicating that there have been positive changes in children's health.

Wrong options:

• determines: Determines is a verb that does not fit as it does not relate to the concept of advancement in health.
• fundamental: Fundamental is an adjective that describes importance, which does not fit as it does not refer to the changes made in health.
• remains: Remains is a verb that indicates continuity, which does not fit as it does not describe the advancements in health.
• removed: Removed is a past participle verb that means taken away, which does not relate to the concept of improvement in health.
• valid: Valid is an adjective that means acceptable, which does not fit as it does not describe the advancements made in health.
• prevented: Prevented is a past participle verb that refers to stopping something from happening, which does not fit as it does not describe the improvements in health.

Correct answer: remains

Explanation: The word 'remains' is a verb that indicates something continues to exist or is still present. It fits grammatically as it describes the ongoing need for work to improve health outcomes for children.

Meaning: 'Remains' means continues to exist or is still necessary, indicating that further efforts are needed in children's health.

Wrong options:

• determines: Determines is a verb that means to decide or conclude something, which does not fit as it does not convey the ongoing need for work.
• fundamental: Fundamental is an adjective that describes importance, which does not fit as it does not indicate continuity or necessity.
• removed: Removed is a past participle verb that means taken away, which does not fit as it does not convey the ongoing need for improvement.
• valid: Valid is an adjective that means acceptable, which does not fit as it does not indicate the necessity for further work.
• progress: Progress is a noun that refers to advancement, which does not fit as it does not indicate the need for ongoing efforts.
• prevented: Prevented is a past participle verb that refers to stopping something from happening, which does not fit as it does not convey the need for continued work.

Correct answer: prevented

Explanation: The term 'prevented' is a past participle verb that indicates stopping something from occurring. It fits grammatically as it describes the child deaths that could be avoided with proper care.

Meaning: 'Prevented' means to stop something from happening, indicating that many child deaths could be avoided with appropriate measures.

Wrong options:

• determines: Determines is a verb that means to decide or conclude something, which does not fit as it does not relate to stopping deaths.
• fundamental: Fundamental is an adjective that describes importance, which does not fit as it does not convey the action of stopping deaths.
• removed: Removed is a past participle verb that means taken away, which does not fit as it does not indicate prevention of deaths.
• valid: Valid is an adjective that means acceptable, which does not fit as it does not relate to the prevention of child deaths.
• progress: Progress is a noun that refers to advancement, which does not fit as it does not indicate the action of preventing deaths.
• remains: Remains is a verb that indicates continuity, which does not fit as it does not convey the action of preventing deaths.