Answer:
I'll will say it could be 3 or 4
The peninsular rivers are seasonal because they depend on rainfall for water.
A depression in the ground due to a cave collapse or acidic water dissolution of limestone is called a B)sinkhole. The collapse has usually happened on the surface layer of the ground. There are many notable examples of sinkholes which can be found around the world, which have become touristic sites. Sinkholes can be caused because of both natural and artificial processes.
I think the answer youre looking for her is A
But, the runoff from the land causes water pollution and the methane in their feces causes air pollution and all in all can cause acid rain.
But i'd say they want answer A