Types include cumulus, stratus, and cirrus

Cumulus, stratus, and cirrus are all the main types of clouds. Cumulus clouds are indicators of fair weather but can turn into thunderstorms. Stratus clouds are flat clouds that are indicators of  steady rains. Cirrus clouds are high up the sky which are made up of ice particles and are indicators of a fine weather.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

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.