The following extract is missing four commas. Insert them in the appropriate places.  

The meadow which was covered with  yellow, blue and white flowers was  a beautiful sight. The native gras ses were thriving because the whole  area, barring only the pasture had  become a registered nature reserve . In fact, it was so pretty that I  tried to take a picture, but then I  saw that my phone battery had died . Disappointed I walked back to the  hotel to recharge it.

The meadow, which was covered with yellow, blue and white flowers, was a beautiful sight. The native grasses were thriving because the whole area, barring only the pasture, had become a registered nature reserve. In fact, it was so pretty that I tried to take a picture, but then I saw that my phone battery had died. Disappointed, I walked back to the hotel to recharge it.

one is a red flower, and one is the sky when the sun sets.

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.