How could semantics be defined?
a. as a set of rules that studies how words are broken down into morphemes
b. as a set of rules that is concerned with understanding the meaning of words
c. as a set of rules that dictates how vowels and consonants are pronounced
d. as a set of rules that determines how words can be arranged into sentences

the answer is letter B

Semantics could be defined as a set of rules that is concerned with understanding the meaning of words. Option B is correct.

The noun semantics refers to the branch of linguistics and logic which studies meaning of words. The two main areas are on the one hand, logical semantics which deals with matters including sense and reference and presupposition and implication, and on the other hand,  lexical semantics, which addresses the analysis of word meanings as well as relations between them.

what are the sentences?

for this case, we must find the number of deaths per day of the year 2015, in automobile accidents, knowing that 32,400 people died.

knowing that the year 2015 had 365 days we have the following division:

where "x" represents the number of deaths per day.

rounding off we have:

approximately, 89 people per day died in 2015

answer:

89 people per day