30 points
sort the activities based on whether they decrease or maintain biodiversity.

planting more trees
excessive mining to obtain minerals
releasing sewage water into lakes
prohibiting fishing during breeding season

Maintains :planting more trees

Decreases: excessive mining to obtain minerals

Decreases: releasing sewage water into lakes

Maintains: prohibiting fishing during breeding season

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.