What are matter, particle and atom? How can you explain matter using the terms particle and atom? sorry if its the wrong subject I was busy

Energy is the capacity to do work. Matter has mass and occupies space. All matter is composed of basic elements that cannot be broken down to substances with different chemical or physical properties. ... Atoms are the smallest particle into which an element can be divided

Explanation:

i believe the correct answer is a

i say that the right answer is: three personal subject pronouns. that’s because you will see “she” two times, referring to the librarian, and “they” one time, referring to the books. personal subject pronouns are used to replace common nouns or proper names.

the only possessive noun it’s present on the first sentence, when the speaker refers to “his” father.