Answer:
I think it is the first one
Explanation:
I
Answer:
expansion and melting of land ice
Explanation:
The ability of a cell or a body to fight against the infection is called immunity. The T cell and B cell helps the body to fight against the infection.
<h3>
What are T cells?</h3>
T cell is also called as T lymphocyte, it is also a important part of immune system. T cell originate in the bone marrow and mature into the thymus.
There are three types of T cells:
- T helper cell
- T killer cells
- T cytotoxic cells.
Helper T cells secrete chemical messengers called cytokines. Regulatory T cells helps to control immune reactions. They are released into blood streams.
Therefore, The ability of a cell or a body to fight against the infection is called immunity. The T cell and B cell helps the body to fight against the infection.
To learn more about T cells, refer to the link:
brainly.com/question/1434048
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I can't read that, if you can type it I could help you
the answer is slowly first, then rapidly
