Consider this animal cell.

the organelles in an animal cell are labeled. part a is a structure that is comprised of flattened membranous sacs.

which organelle is labeled a?
mitochondrion
ribosome
golgi apparatus
lysosome

The answer to your question is  the Golgi apparatus

Explanation:

Mitochondria is letter G

Ribosome could be letter E

Golgi apparatus is letter A

Lysosome is letter B

Golgi apparatus has a function similar to a post office because it modified, sorted, packed and distributed proteins and lipids.

sex cells are usually half's then they find another half and make a fertilize egg