It is incorrect its B.tropism
The answer is nucleus.
EXPLANATION
Eukaryotic cells are larger than prokaryotic cells and have a “true” nucleus, membrane-bound organelles, and rod-shaped chromosomes.
The nucleus houses the cell’s DNA and directs the synthesis of proteins and ribosomes.
Level of the carry out airways from the nose or mouth.
A.True
a healthy diet provide the nutrition that you need