The Correct Answer Explained:

1. Understanding the Context:
In this sentence, the speaker is giving advice to someone, suggesting that they should go with a particular group of people. The reason for this suggestion is that if the person does not go with them, they will become bored.

2. Verb Tense and Conditionals:
The correct answer to complete the sentence is "will get bored." This is because the sentence is in the future tense and expresses a possible outcome or condition. In English, we use the future simple tense (will + base verb) to talk about future events or possibilities.

3. The Zero Conditional:
The sentence structure "otherwise you will get bored" is an example of the zero conditional. The zero conditional is used to talk about general truths or facts, stating that if one thing happens, another thing always happens as a result. In this case, the general truth is that if the person does not go with the group, they always get bored.

4. The Meaning of "Get Bored":
To understand why "get bored" is the correct answer, it is important to understand the meaning of the phrase. "Get bored" means to become uninterested, restless, or lacking in stimulation, often due to a lack of activities or entertainment. In this context, the speaker is suggesting that if the person does not go with the group, they will not have enough stimulation or entertainment and therefore become bored.

5. The Implication of Not Going:
By suggesting that the person will "get bored" if they do not go with the group, the speaker is implying that the group's activities or company will provide enough interest and engagement to prevent boredom. This suggests that the group offers an enjoyable or engaging experience that the person would miss out on if they do not join them.

Overall, the correct answer "will get bored" accurately conveys the speaker's advice that the person should go with the group to avoid becoming bored. It follows the rules of verb tense and conditionals, and it aligns with the meaning and implication of the sentence in the given context.