Need for raw materials because of the plentiful amount that is in Africa, such as gold, diamonds, wood, and coal.
Answer- Parallel.
In-Line Answer:-
In a longitudinal wave, "Energy and the wave are moving in <u>parallel</u> direction"
The most easily polluted groundwater reservoirs are <span>water-table aquifers. The correct option among all the options that are given in the question is the fourth option or option "D". The other options can be easily negated. I hope that this is the answer that has actually come to your help.</span>