Hey random enthusiast, you have got a question that even my reacher didn't got (such a shame). Back to business, I'll answer your question to make her proud

As you know, in dry or arid areas, there is rarely a rainfall and you can't expect a continues source of WATER as well. In the worst case scenario, even people don't have water to DRINK, and some PLANTS require more water than we require for a week. But they have to grow to gain money and to support family and how is that possible? that's when drip irrigation came like a superman (woosh)

Drip irrigation is like a loooong pipe with small pores in it. You send water through the pipe and the water comes out through the holes to supply water to plants. By this WAY, your plant gets constant supply of water and you won't loose enough water in a day. Hence, they are extensively used in arid areas to grow crops

PS:- did you know mustard plant takes water equal to its weight in just 5hours, thirsty idiot

Hope it helped, keep reading and doubting cause DOUBTS lead to success