Answer:
Well, even though there is no context - the possible signs of a forced migration would be loss of food, lack of crops, weather/climate change, battle of some kind, etc.
The three types of rainfall include relief, convectional, and frontal rainfall. Relief rainfall is rainfall that occurs when wind blows moist air...
I know for sure the ganga and brahmaputra rivers do make up the northern plains, not sure about the yamuna. but since two do, then i would answer all of these
