Which one of the following sentences contains an abstract noun?

D. Logic is easily understood.

Explanation:

Abstract noun illustrates intangible things which may include an idea, state, feeling or quality as contrary to the concrete noun. It exemplifies the objects that do not exist in physical or material state that can only be experienced through senses. Thus, the "logic" in the last option displays this quality as it is an abstract feature while the other options employ the concrete noun as they have a material state.

step-by-step explanation:

hello!

(x,y)=(150,300)

300 adult tickers were sold!

good luck!

what makes a hero is someone who tries and acres and then to save people and it’s not their jobs to save them just a normal person that has no experts of saving people would jump in to action without it twice about doing it. me that’s the defection of a hero!