Humans can will themselves to eat more, as we know that food comes easy to us.
Animals, on the other hand, top priority is survival, so they usually wouldn't think about eating more because it just "tastes good."
Answer:
A. Gazed
Explanation:
you cant heave or descend into someones eyes. Gazing or looking into someone's eyes makes the most sense.
A. To understand the nature of an experimental subject
