The correct answer is B. Reflexive
Explanation:
In grammar, a pronoun refers to a word that replaces a noun, which is a place, person, object or animal. Additionally to this, pronouns are classified into different types, this includes intensive and extensive pronouns. Intensive pronouns are pronouns that end in -self or -selves and are mainly used to give emphasis to a noun. On the other hand, reflexive pronouns also end in -self or -selves but these refer to the subject of a sentence or the noun that performs the action. This means while intensive pronouns refer to any noun in a sentence reflexive ones only refer to the subject. In the case of the sentence "The spider lowered itself on a thin strand of silk" the pronoun is "itself" and refers to "the spider" which is also the subject or agent that performs the action and therefore this pronoun is a reflexive pronoun.
