Some organelles, such as the endoplasmic reticulum and Golgi bodies, have a large and folded structure. What is an advantage of these organelles having a folded structure?

Explanation:

In endoplasmic reticulum, many folds leads to an increase in surface area for ribosomes to attach which allows for protein synthesis to occur at an efficient rate.

mitochondria has two membrane,

It has an inner membrane which is folded inside the other. The fold create cristae, which is the site for a portion of cellular respiration.

The folds also enables a large surface area that makes chemical process to occur in an efficient way.

i believe the answer would be b. hope it : )

the tricuspid valve is present between right atrium and right ventricle