Specialized cell parts
A. cell therapy
B. Vacuole
C. organelles
D. Tissues

B.

Explanation:

Organelle doesn't have a function it's just what you call the specialized cell parts.

And tissues in not part of a cell it is made up of cells.

And cell therapy is a automatic no

So the only reasonable answer is Vacuole.

In animal cells, vacuoles are generally small and help sequester waste products. In plant cells, vacuoles help maintain water balance. Sometimes a single vacuole can take up most of the interior space of the plant cell.

HOPE THIS HELPS YA!!

b

Explanation:

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.