Which of these is a hypothesis

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

Hey me with this one❤☺❤ how do you say that a cell also has a life span and death like an organism? give one example.

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?