The only answer that is not an example of a cell specialization is :
<span>Bacteria cells are small in size in order to easily diffuse in and out of the cytoplasm.
All of the other examples, the muscle, nerve and the rod and cone cells have specific cell structures, shapes, and proteins that enable them to execute their specific roles in the organism. </span>
Answer:
it depends what kind of energy your taking about, like human energy or nonrenewable energy. If it is human energy then the option c, but if it is nonrenewable energy than b.
Explanation:
the other options aren't very logical
A is the ans for this question
C: lack of water during long periods..
If it has valves then it is a vein.