Answer:
We eat to gain nutrients for our bodies to function.
Step-by-step explanation:
Eating is essential to human survival basically if we don't eat we won't be able to do activities and it will cause people to become sluggish. Eating provides the body with nutrients to grow and repair, if you don't eat you won't be able to gain back blood cell counts and it just makes your body work way more slowly than usual. If we didn't eat our bodies would lack the energy to be able to survive and thrive.
Animals in the ocean will eat other animals or plants in the ocean just like land animals. Often times they will eat animals smaller than them or have seaweed and kelp depending on the animal's diets.