What is the role of bitechnology in the environment

i already answer but here you go again

it addresses environmental problems, such as the removal of pollution, renewable energy generation or biomass production, by exploiting biological processes.

Explanation:

answer; ///i believe that the correct answer is (a) specialized cells)

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.