Pls help with these, at least up to finishing question 2 or Question 3b

In sentence "Abstract" word is best used is:

"Patriotism is strong emotion,but it is still an abstract concept".

Step-by-step explanation:

Given: There are 4 sentences with word abstract used in it.

To find :Best use of Word "Abstract".

Solution:

As we know the word abstract has three roles in grammar as

noun, verb and adjective.

For reference given the sentence ,

Geometry involves concepts that  are abstract.

In this above sentence "Abstract" is used as a "adjective".

As it is gives description about the concepts as they are which means they are " symbolic but not representational."

Similar ,

In 2nd sentence the  word is used as "Adjective" but the meaning that relates is likely "his theories are so "advanced or intellectual"  so no one can understand it".In 3 rd sentence the word is used as "Verb" which means "remove".In 4th sentence the word is used as "Noun" means  "summary of content or formal speech".

Hence

The sentence : Patriotism is strong emotion,but it is still an abstract concept

In this ,word " Abstract " is best used because  the word play Adjective role with same meaning used in reference sentence ,meaning as "Symbolic"