Question

select the best evidence to support the statement that the narrator has heard lots of frightening rumors about one of her neighbors.
we lived on the main residential street in town—atticus, jem and i, plus calpurnia our cook....
when i was almost six and jem was nearly ten, our summertime boundaries (within calling distance of calpurnia) were mrs. henry lafayette dubose’s house two doors to the north of us, and the radley place three doors to the south. we were never tempted to break them. the radley place was inhabited by an unknown entity the mere description of whom was enough to make us behave for days on end.
from harper lee, to kill a mockingbird. copyright 1960 by harper lee

Explanation:

To support the statement about the narrator hearing frightening rumors about a neighbor, we analyze the text. The relevant part is about the Radley Place: "The Radley place was inhabited by an unknown entity the mere description of whom was enough to make us behave for days on end." This shows the neighbor (the Radley resident) had a frightening reputation as even the description made the children behave, implying scary rumors. The other text about the residential street and summertime boundaries doesn't relate to rumors. So the sentence about the Radley Place being inhabited by an unknown entity with a description that made them behave is the best evidence.

Answer:

The sentence: "The Radley place was inhabited by an unknown entity the mere description of whom was enough to make us behave for days on end."