Less is a comparative form of adjective. Comparative degree of comparison is comparing two nouns. In the sentence, the space in the old house is compared to the new ones, Positive degree is used in describing only one noun, and superlative degree compares three nouns.
"Effect" is a noun, referring to the possible outcomes of something. "Affect" on the other hand, is a commonly used as a verb, meaning to influence or to cause to become something.
The correct answer is letter "A. Effect". "What effect will the bad weather have on our travel plans?" I hope this helps.
Answer:
A.) It's late, I must go home or my mother will be upset.