Sneezing is an involuntary action because it's something we cannot control.
Answer:
The correct option is B (natural killer cells).
Explanation:
Natural killer cells: They are defined as the type of cytotoxic lymphocyte which are critical to the innate immune system. The NK cells play an important role in to provide rapid response to tumor formation, virus infected cells, and acting after three days of infection.
While cancer cells die, they release some antigens, than these antigens are recognized by the immune system, and later they are presented on the immune cells which are known as antigen presenting cells. So, if these cells are absent than they increase the chances of developing malignant tumors.
Knysna Lourie is naturally found in mature evergreen forests of southern and eastern South Africa, and Swaziland. Although it can vary, and answer of a possible biome can be the Savannahs found in south Africa.
