Answer:
The correct answer is - option D.
Explanation:
Qualitative research is research or scientific method which is involved in various subject matters and fields, of collecting observation and nonnumeric data. This is the research normally is descriptive, exploratory and other qualitative methods to answer the question.
It is an investigation that is not just addressed what and where but also to the questions like how, and why. This is the reason these are used in small samples rather than large samples and also used on species cases to get information.
Thus, the correct answer is - option D.
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
#SJ2
<span>a cone formed around a volcanic vent by fragments of lava thrown out during eruptions.</span>
Surface runoff is a term used to describe when soil is infiltrated to full capacity and excess water, from rain, snowmelt, or other sources flow over the land. This is a major component of the water cycle or the hydrological cycle.
