In the conversation 1.b, Samiul says, 'I enjoy watching movies with my friends.' The text explicitly states '(watching: object of the verb enjoy)', which identifies 'watching' as a gerund functioning as an object.
Class 6 › English Grammar and Composition › Chapter 5: The -ing form of Verb: Gerund & Participle › Topic: The -ing form of verbs: Gerund
Aligned to the NCTB national curriculum.