A deer ___ in the forest. Choose the correct verb form: live, lives, don't live.

The correct answer is "lives". Here's why: * Subject-verb agreement: The subject "A deer" is singular, so the verb must be in the singular form as well. The singular form of "live" is "lives". * Present Simple: This sentence describes a general fact or habit about where deer live, so we use the Present Simple tense. Therefore, the completed sentence is: "A deer lives in the forest."