My father worries about my riding a motorcycle which case is the underlined pronoun

The pronoun in this sentence is "my" which is a possessive pronoun.

Explanation:

Possessive pronouns are the types of pronouns that make a reference to speech people indicating a relation of ownership. Possessive pronouns maintain a close relationship with personal pronouns as they indicate what belongs to persons indicated by personal pronouns.

he does not belive what the men tell him about the jungle

scholarship is an sc because, by definition, a subject complement is the adjective, noun or pronoun that follows a linking verb, for example the verb be (in any of its forms).