The cell structure labeled X is found only in A animal cells
B eukaryotic cells
C plant cells
D prokaryotic cells

B. eukaryotic cells

Explanation:

because b is the only cell that has a nucleus.

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .