Nouns that name things that you cannot perceive by the senses are nouns.

1.compound
2.abstract
3.concrete
4.collective

The correct answer is 2. Abstract

Explanation:

In grammar, a noun refers to a word used to name a person, animal, object, entity or concept that can work as the subject or an object in sentences. Additionally, nouns are classified in multiple categories this include common nouns that name general places, things, etc; proper nouns that name specific places, people, etc; compound nouns that are composed by one or more words; collective nouns that name a group of things, animals or people and in terms or whether nouns exist physically and can be perceived that can be classified as concrete if they can be perceived by the senses or abstract if they cannot perceive or refer to ideas, concepts, etc such as friendship, luck, hate, hope, etc. Therefore, the nouns that name things you cannot perceive by the senses are abstract nouns.

the answer is   b suffix addition