Answer:
1. physical and chemical barriers
2.non-specific innate response
3. specific adaptive responses
Explanation:
The answer is a because if you look at the bone structure in each animal, you would notice how similar they look to one another, and all of the animals above use their legs for the same function which is walking which can suggest that all had a common ancestor.
hopefully this helps
Answer:
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The deap ocean, like close to the bottem...
