Sentence Correction

In the search for alien life, astronomers have recently begun studying a promising region, a solar system that is populated by a number of potentially life-friendly planets formed by fragments of an exploding star some 7 million years ago and features many of the geological and climatic prerequisites for the evolution of life.

features
had featured
featuring
featured
have featured

o.a after some discussion

I would go for A.
Parallel should be between
1. "is populated by a number of potentially life-friendly planets formed by fragments of an exploding star some 7 million years ago and "
2. "features many of the geological and climatic prerequisites for the evolution of life "

as "Is populated" - simple present tense, hence it should be features

It should be C...we need a continuous form here.

Solar System that is Populated by X, Formed by Y and Featuring...

Regards
Jerry

mohan514 wrote:In the search for alien life, astronomers have recently begun studying a promising region, a solar system that is populated by a number of potentially life-friendly planets formed by fragments of an exploding star some 7 million years ago and features many of the geological and climatic prerequisites for the evolution of life.

features
had featured
featuring
featured
have featured

o.a after some discussion

I would go with C, featuring.

a solar system that is populated by a number ..... and featuring many of the geological