Answer:
Mechanical digestion
Chemical digestion
Explanation:
Food is physically broken into smaller parts. For instance, by chewing.
Food is broken down by acids and enzymes into its basic units.
clam
puffer fish is the only omnivore present in this diagram. this shows clam is eaten by pufferfish. so the answer is clam
D
Your answer would be Heat
Hope this helps!
then the higher class will be affected and the ecosystem will die