Question

passage
while some animals hibernate to escape frigid winter temperatures, others aestivate, basically \sleeping\ through periods of heat and/or drought, when food and water are scarce. the latin term \aestivation\ means \summer sleep.\ just like animals that hibernate, aestivating animals go into a sleep - like state in which they experience a drop in breathing and heart rate. however, aestivating animals do not need to utilize as much stored energy from food as do animals that hibernate.
question
the passage suggests that aestivating animals
○ are not actually sleeping
○ may also hibernate during cold periods
○ do not use any stored energy from food
○ must keep drinking water in order to survive

Explanation:

The passage says aestivating animals go into a "sleep - like" state. "Sleep - like" implies they are not in actual sleep.

Answer:

are not actually sleeping