The slogan; for example, think of McDonalds. you may think of the logo, but you always think of their slogan, “I’m Lovin it”
Sentence 3&4 both follow a parallel sentence structure. Sentence 3 says "because of the snow and ice" and "because of the lack of heat", which have the same structure. This applies for the last sentence as well.
B. SO2, is the covalent bond of sulfur and oxygen.
