he does that to show more expression in his stories. it is what all or most writers do to grab the readers attention. a writer doesn't want their readers to fall asleep and then get a bad review. if Edgar gets more and more anxiety in his story it will keep you wondering.
hope this helps
The second one/B
Because they all start with S
I think the answer may be water pollution.
water pollution > Water pollution<span> is the contamination of </span>water<span> bodies (e.g. lakes, rivers, oceans, aquifers and groundwater). This form of environmental degradation occurs when </span>pollutants<span> are directly or indirectly discharged into </span>water<span> bodies without adequate treatment to remove harmful compounds.
source: Wikipedia </span>
