Russell explains that philosophy aims at a type of knowledge that gives unity and system to the body of

Science

Explanation:

The great philosopher and mathematician Bertrand Russell used to see the value of philosophy,  almost from an epistemological point of view. To him, the worth of philosophy is to prove the validity of convictions and at the same time, to make the Science as solid and profound as possible.

He did that in Philosophy of Science, in Mathematics.

the answer would be c. sediment buildup on continental slope

                                                                                -hope this -

c

explanation: because you need to reduce the pollution on land,the exhaust fumes will stop,and stop it in water,the oil that is in the oceanharms the fish   sorry if you   have been waiting long