Which of the following suffixes changes a verb to a noun? ion , ing , ed , er

The suffix is -ing.

Example:
He came and was met by the city's people.
The coming of the man was well-received.

I write for a living.
My writing makes me a lot of money.

The correct answers are: -ing, -er and –ion.

Explanation:

IMPORTANT: A verb is an action, whereas a noun is a person or thing.

I read a lot every day in order to increase my vocabulary. (I read, you read, we read, etc… verb conjugation with pronouns) This reading was rather dramatic, I didn’t like it. (Reading as a noun referring to a piece of writing or thing that can be read).  I play soccer with my friends every Saturday. (Again, the conjugation of the verb play with different pronouns.) Lionel Messi is a very famous Soccer Player. (Player as a noun here, is the person who performs the action, in this case of playing soccer.) We communicate every day in order to maintain a control in the office. (The action of “communicate” can be conjugated with every pronoun.) The communication in the office among the coworkers is horrible. (With the suffix –ion becomes a noun, a thing.)

And the suffix -ed cannot be possible as it can only change the verb to an adjective (a descriptive word).  

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