Suffixes -er and -or

What noun suffix would you add to the verb "direct" to make it a noun for a person who directs?

The (a)   makes amazing cakes (bake)

The (a)   helped pull the cat out of the tree. (rescue)

The (a)   of the bicycle crashed and hurt his knee. (ride)

The (a)   ran around the track four times. (run)

Which of the following words correctly uses the suffix '-er' to indicate a person who performs an action?

Identify the word that uses the suffix '-or' to indicate a person who performs an action.

What is the primary function of the suffix '-er' in the word 'writer'?

Choose the word that correctly uses the suffix '-or' to indicate a person who performs an action.

In the sentence 'The editor reviewed the article,' what does the suffix '-or' in 'editor' signify?