7. which of the following is not a natural cause of climatic change? a. volcanic activity b. human activity c. solar activity d. earth's tilt

I'm not sure i'm sorry

Water flows along the east coast and across the western tropical pacific towards south america, while they both are directed towards that way,  el niño does not directly affect the southern flow of water along the coast. 

Answerwill have thinner; have thicker oceanic sediments;