Respuesta :
A preposition is a word that is used before nouns pronouns or other substantive to form phrases functioning as modifiers of verbs, nouns or adjectives, and that typically expresses a spatial, temporal, or other relationship, as in:
about, on, by, to, since...
about, on, by, to, since...
Answer:
about
Explanation:
A preposition is a word which tells about the relation between the subject and the other part of the sentence. Prepositions tell about the time, location and the relation in the sentence. Usually, the prepositions are placed before the nouns. The preposition 'about' tells about the relation which the time when Maya Angelou wrote: "I Know Why The Caged Bird Sings".