Two notable ways than setting fishing limits can help protect fish species:
Preservation of fish - this prevents extinction, and at the same time helps other species of fish catch their prey. Thus, making the food chain stable.
Preserves the nature of underwater - fishes tend to take care of their underwater world, and preserving them helps maintain the appearance under the oceans and sea.
Minnesota<span>, </span>Wisconsin<span>, Illinois, </span>Indiana<span>, </span>Michigan<span> and </span>Ohio<span>. </span>
I believe it's B, hope this helped