Meaning: 'Marked' means to be characterized or distinguished by something.

Wrong options:

• turning: 'Turning' is a gerund that does not fit the grammatical structure needed here, as it does not describe the Age of Exploration directly.
• placing: 'Placing' is a gerund that implies an action of putting something in a position, which does not fit the context of describing a historical period.
• convened: 'Convened' is a verb that means to come together for a meeting, which does not apply to the context of historical characterization.
• referring: 'Referring' is a gerund that indicates mentioning something, which does not fit the grammatical structure needed here.
• embarked: 'Embarked' is a past tense verb that describes the action of starting a journey, which does not fit as a descriptor for the Age of Exploration.
• forging: 'Forging' is a gerund that implies creating or forming something, which does not fit the context of marking a historical period.

Correct answer: embarked

Explanation: The term 'embarked' is a past tense verb that indicates the action of starting a journey. It fits grammatically as it follows the subject 'navigators' and maintains the past tense narrative of the passage.

Meaning: 'Embarked' means to begin a journey, especially on a ship.

Wrong options:

• turning: 'Turning' is a gerund that does not fit the context of describing an action taken by navigators.
• marked: 'Marked' is a past participle that describes a state rather than an action, which does not fit here.
• placing: 'Placing' is a gerund that implies putting something in a position, which does not relate to the action of starting a journey.
• convened: 'Convened' is a verb that means to gather for a meeting, which is not relevant to the context of exploration.
• referring: 'Referring' is a gerund that indicates mentioning something, which does not apply to the action of embarking on a journey.
• forging: 'Forging' is a gerund that implies creating or forming something, which does not fit the context of starting a journey.

Correct answer: forging

Explanation: The word 'forging' is a gerund that indicates the action of creating or forming connections. It fits grammatically as it follows the conjunction 'and' and maintains the parallel structure with 'embarked.'

Meaning: 'Forging' means to create or establish something, often with effort.

Wrong options:

• turning: 'Turning' is a gerund that does not fit the context of creating connections, as it implies a change rather than an action of forming.
• marked: 'Marked' is a past participle that describes a state rather than an action, which does not fit here.
• placing: 'Placing' is a gerund that implies putting something in a position, which does not relate to the action of forming connections.
• convened: 'Convened' is a verb that means to gather for a meeting, which is not relevant to the context of establishing connections.
• referring: 'Referring' is a gerund that indicates mentioning something, which does not apply to the action of forging connections.
• embarked: 'Embarked' is a past tense verb that describes the action of starting a journey, which does not fit the context of forming connections.

Correct answer: turning

Explanation: The term 'turning' is a gerund that describes a significant change or shift in history. It fits grammatically as it serves as a noun that indicates the Age of Exploration was a pivotal moment.

Meaning: 'Turning' refers to a change or shift in direction, especially in a significant context.

Wrong options:

• marked: 'Marked' is a past participle that describes a state rather than a significant change, which does not fit the context of a turning point.
• placing: 'Placing' is a gerund that implies putting something in a position, which does not relate to the concept of a pivotal moment in history.
• convened: 'Convened' is a verb that means to gather for a meeting, which is not relevant to the context of a turning point in history.
• referring: 'Referring' is a gerund that indicates mentioning something, which does not apply to the concept of a turning point.
• embarked: 'Embarked' is a past tense verb that describes the action of starting a journey, which does not fit the context of a turning point in history.
• forging: 'Forging' is a gerund that implies creating or forming something, which does not fit the context of describing a significant change.