B is the answer since it needs to be improved
The esophagus has a simple but significant functions to animals who has it. These functions can be a) to swallow food and serve as a passageway to the stomach and b) may serve to release the eaten food that might have some harmful compositions or chemicals -the vomit response.
I think yur answer will be a. because Double Bond
<span>a double covalent bond; the sharing of two pairs of valence electrons by two atoms hope it helped</span>
Answer: rna
Explanation: i got it right on mine
on e might have it but the other might not and the disease got inheried
