Importance of freezing stem cells in South Africa?

Stem cells are special cells found in the human body which has the ability to change into different cell types and functions.

They are expensive in South Africa and are freezing the stem cells helps in the preservation of the cells for research works in the medicine. They are also used in the treatment of different illnesses which requires cells and tissue transplants.

It's the 3rd one I Believe

Explanation:

I took the test then went over it with the teacher