The percentage of adults who report they are close to their siblings is

The correct answer is " two-thirds of adults".

Siblings are individuals who has one or both parents in common with each other, or in other words they come from one family. Siblings are mostly close to each other and sometimes it depends on how they are raised, sometimes siblings may be greedy or selfish to one another, yet it is up to their parents on how they will be treated and how siblings will treat their brothers or sisters.