During the late 18th and mid-19th centuries, europeans and north americans were attracted to nearby coastal waters due to potential economic gains from
1.) catching trout and cod fish.
2.) catching seals and whales.
3.) shipbuilding.
4.) finding riches on unexplored islands.

The best and most correct answer among the choices provided by your question is the fourth choice or letter D.

During the late 18th and mid-19th centuries, Europeans and North Americans were attracted to nearby coastal waters due to potential economic gains from finding riches on unexplored islands.

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