C, pretty sure due to natural selection and theory of evolution
Animals were used for food.!
Cells communicate through their own language of chemical signals. Different compounds, such as hormones and neurotransmitters, act like words and phrases, telling a cell about the environment around it or communicating messages.
Answer:
fish - seahorse, clown fish
amphibians - frog, lizard
reptiles - alligator, cobra
birds - duck, falcon
mammals - human, cow
Explanation:
easiest way to remember is
franklin(fish) ate(amphibians) really(reptiles) big(birds) meals(mammals)
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and for the animals that fall under those categories
Sam(seahorse) found(frog) a(alligator) dirty(duck) house(human)
The plant receives energy from the sun and food sources.