Question

question 3 of 25
which question requires the collection of data to answer it?
a. how many hours a day do dolphins sleep?
b. do dolphins make good pets?
c. are dolphins cuter than porpoises?
d. should dolphins be trained for military uses?

Explanation:

To know the number of hours dolphins sleep per day, data collection through observation or research is needed. Options B, C, and D are more subjective questions based on opinions rather than requiring data - collection for an answer.

Answer:

A. How many hours a day do dolphins sleep?