Answer:
Relative pronouns rename words that adjectives describe.
Step-by-step explanation:
If you read the text, you will see that it has nothing to do with basketball - the word basketball is used only as an example to describe what relative pronouns are, which makes the first option incorrect.
The last option is also incorrect as 'that' doesn't have to be at the front of a clause.
What is correct is that this text is about relative pronouns. As the option says, relative pronouns rename words that adjectives describe. Here, the adjective, or adjective clause is that many people enjoy, which starts with the relative pronoun that and renames the word sport which is described by the adjective.