Before you start playing video games, rake the entire backyard. the bolded verb in this sentence is written in the a) indicative mood. b) imperative mood. c) conditional mood. d) interrogative mood.

Rake: imperative mood

The imperative mood is used for giving commands, advice, suggestions. It's subject is often implied rather than directly stated like in most sentences.

The indicative mood is used for statements of fact. Most sentences fall under this category. In fact, all of the main verbs in the sentences to create this answer are all written in the imperative mood unless they are examples of another verb mood. Conditional mood happens when conditions are given such as in the sentence "I would like to stay inside". Conditional mood often uses the verb would. Interrogative mood is used for questions as in "Are you hungry?". Are is in the interrogative mood.