I believe the answer is a.
<span>In the west region of the US has natural sources like water, coal, oil, iron ore and lumber and there are a lot of forests and mining sites.</span>
It can affect by farming and rain hope this helps ☺
In 2012, the amount of farmers, ranchers and other agricultural managers was 3.2 million. Also, 757,900 estimated agricultural workers were legally employed in the US.
