Europe's vast coastline and inland river system have had the greatest impact on
a) the continent's fishing and shipping industries.
b) the continent's investing and banking industries.
c) the continent's mining and agriculture industries.
eliminate
d) the continent's technology and manufacturing industries.

Coastline and river system are systems of water: therefore we must choose an answer that is somehow related to water.

The correct answer is therefore:A) the continent's fishing and shipping industries.

Both fishing and shipping can only happen if there is a big body of water - best connected to other bodies of water.

Answer glacier terminus;

Answer light in color; silica-rich;