Why did the color of the peppered moth change?
The moths' life cycle changed.
The environment changed.
The amount of variation in the moth population changed.
The number of individual moths in the population changed.
FAST

the enviroment changed

Explanation:

Environmental change

Explanation:

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.