The layer is the Mucosa layer.
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-Payshence xoxo
Answer:
C- a duck catching and eating a snail
Explanation:
Biotic factors involve living things. The only choice with two living beings interacts would be C.
the plants developed due to a lack of water and a need to preserve as much water as possible
B definitely because d is just dumb, c is not possible, a is not even true so b