SEIZE is the correct answer.

Meaning: To take hold of suddenly or forcibly.

Usage: In the given sentence, 'SEIZE' means to grab or take hold of the opportunity to travel with a guide.

Explanation:

When we say 'seize an opportunity,' it means to take advantage of an opportunity that presents itself. In the given sentence, the speaker is advising someone to take advantage of the opportunity to travel with a guide. Here are some points that explain why 'seize' is the correct answer:

- 'Seize' implies urgency: The word 'seize' has a sense of urgency to it. It suggests that the opportunity is fleeting, and one should act quickly to take advantage of it. In the given sentence, the speaker is urging the listener to act quickly and not let the opportunity slip away.

- 'Seize' implies action: When we 'seize' something, we take action to grab hold of it. In the given sentence, the speaker is advising the listener to take action and make the most of the opportunity to travel with a guide.

- 'Seize' implies initiative: When we 'seize' an opportunity, we take the initiative to make something happen. In the given sentence, the speaker is encouraging the listener to take the initiative and make the decision to travel with a guide.

Conclusion:

In conclusion, the correct answer to the given question is 'seize.' The word conveys a sense of urgency, action, and initiative, which are all relevant to the context of the sentence.