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.

: b : o   : 0 ; b : - )  

: b: b: b: b: b: b: b: b: b

the answer:

in the first part of the story running is all that matters to squeaky. running gives her confidence and defines who she is. at the beginning of the story she says that other kids call her mercury because she runs very fast. in the text she refers to herself as "miss quicksilver".

the line that provides the best evidence that squeaky has self-confidence is

" and i continue with my breathing exercise, strolling down broadway toward the ice cream man on 145th with not a care in the world cause i am miss quicksilver herself".