Meaning: 'Compounds' refers to substances formed from two or more elements or ingredients, which in this context relates to the various organic substances necessary for health.

Wrong options:

• commitment: 'Commitment' refers to a pledge or obligation, which does not fit the context of discussing biological substances.
• accomplices: 'Accomplices' refers to individuals who assist in wrongdoing, which is irrelevant in the context of vitamins and biological compounds.
• sedatives: 'Sedatives' are substances that induce calm or sleep, which does not relate to the discussion of vitamins and their biological roles.

Correct answer: indispensable

Explanation: The word 'indispensable' is an adjective that means absolutely necessary or essential, fitting the context as it describes the necessity of proteins, carbohydrates, and lipids for bodily functions.

Meaning: 'Indispensable' means something that is essential and cannot be done without, highlighting the importance of these substances for health.

Wrong options:

• insatiable: 'Insatiable' describes an inability to be satisfied, which does not apply to the context of bodily functions being necessary.
• inadequate: 'Inadequate' means insufficient or not enough, which contradicts the intended meaning of these substances being necessary for health.
• inadvertent: 'Inadvertent' means unintentional, which does not fit the context of discussing the necessity of these substances.

Correct answer: sufficient

Explanation: The word 'sufficient' is an adjective that means adequate quantity or degree, fitting the context as it describes the amount of vitamins that cannot be synthesized by the body.

Meaning: 'Sufficient' means enough or adequate to meet a need, indicating that vitamins cannot be produced in adequate amounts by the body.

Wrong options:

• insufficient: 'Insufficient' means not enough, which contradicts the context of discussing the need for vitamins in adequate amounts.
• ignitable: 'Ignitable' refers to something that can catch fire, which is irrelevant in the context of bodily needs for vitamins.
• accountable: 'Accountable' means responsible or liable, which does not relate to the context of synthesizing vitamins.

Correct answer: absent

Explanation: The word 'absent' is an adjective that indicates something is not present, fitting the context as it describes the condition of a vitamin missing from the diet.

Meaning: 'Absent' means not present or missing, indicating that the lack of a vitamin can lead to deficiency diseases.

Wrong options:

• abated: 'Abated' means reduced in intensity, which does not fit the context of discussing the presence of vitamins in the diet.
• omnipresent: 'Omnipresent' means present everywhere, which contradicts the idea of a vitamin being missing from the diet.
• present: 'Present' means existing or occurring now, which is the opposite of what is needed in this context.