Answer:
D. sentence 3
Step-by-step explanation:
The topic sentence of the paragraph should introduce the topic of the text in an interesting way known as the hook. The current first sentence does not introduce anything, it just jumps into the topic and is confusing. However, sentence 3 introduces the fact that a different type of moose exists in a region of the world. This explains what the paragraph will be about and makes more sense. Therefore, it is the best topic sentence presented.