Where, if at all, should one or more commas be added in the following sentence? the planet mars which is earth's nearest neighbor has long fascinated scientists as well as science-fiction fans.

"The planet Mars, wich is Earth's nearest neighbor, has long fascinated scientists as well as science-fiction fans."

We use here commas to connect two separated clauses one beign "the planet mars has long fascinated scientists as well as science-fiction fans  and the other is planet Mars being Earth's nearest neighbor.

The correct option is:

The planet Mars, which is Earth's nearest neighbor, has long fascinated scientists as well as science-fiction fans.

Explanation:

There are defining and non-defining relative clauses. Defining relative clauses provide essential information, whereas non-defining can be removed without altering the meaning of the sentence.

In this case, "which is Earth's nearest neighbor" can be removed without changing the meaning.

frances ellen watkins harper writing was influenced by: b. the education she received growing up in the north.

she was born in baltimore, maryland, on september 24, 1825. after the death of her parents, her uncle reverend william watkins, a teacher at the academy for negro youth, raised and educated her. she also continued educating herself by accessing a library of the family she worked for, beginning writing poetry afterwards. as a civil rights activist and abolitionist, watkins greatly influenced her life and work.