To make the writing look nicer.

To separate similar words.

To indicate a pause.

To create a unique sentence.

A phrase that includes a list of items.

A phrase that adds unnecessary information into a sentence.

A phrase that adds extra information into a sentence.

A phrase that is essential a clause being a complete sentence.

Place commas before and after the nonrestrictive clause.

Place a comma only before the nonrestrictive clause.

Place a comma only after the nonrestrictive clause.

Mahama Gandhi

who studied law in England

led India's freedom movement

I did my undergrad in Boston

where some of the top universities are based

My mother, who saw spark in my eyes for colors and design, nudged me towards a course in fashion design.

My mother who saw spark in my eyes for colors and design, nudged me towards a course in fashion design

My mother, who saw spark in my eyes for colors and design nudged me towards a course in fashion design.

My mother who saw spark in my eyes for colors and design nudged me towards a course in fashion design.

A non-restrictive clause is not used in this sentence.

My father who drives a red car was late to pick me up.

My father, who drives a red car was late to pick me up.

My father who drives a red car, was late to pick me up.

My father, who drives a red car, was late to pick me up.

A non-restrictive clause is not used in this sentence.

The green vase, on the top shelf, is very expensive.

The green vase, on the top shelf is very expensive.

The green vase on the top shelf, is very expensive.

The green vase on the top shelf is very expensive.

A non-restrictive clause is not used in this sentence.

The letter, which was written in blue ink, told Eugene the location of the key.

The letter which was written in blue ink, told Eugene the location of the key.

The letter, which was written in blue ink told Eugene the location of the key.

The letter which was written in blue in told Eugene the location of the key.

A non-restrictive clause is not used in this sentence.

My wife, who is standing over by that tree cooks one of the best apple pies I have ever eaten.

My wife who is standing over by that tree cooks one of the best apple pies I have ever eaten.

My wife who is standing over by that tree, cooks one of the best apple pies I have ever eaten.

My wife, who is standing over by that tree, cooks one of the best apple pies I have ever eaten.