Which contains 1 or more gerunds? 1) Are you enjoying the ancient ruins left behind by Native Americans who lived here a long time ago?
2) Throughout the year, there are many interesting and entertaining art, music, and cultural festivals as well.
3) You will enjoy the manu activities, such as horseback riding, hiking, or camping.
4) I am recommending that you tour New Mexico's beautiful sites.

3) You will enjoy the manu activities, such as horseback riding, hiking, or camping.

Explanation:

Gerund can be defined as a verb form that acts as a noun and is most notable for its -ing ending.

However, every option here contains an -ing form.

But options 1) and 4) use -ing forms as a verb used to make Present Continous Tense.

Option 2) contains -ing form, but in a form of adjective, it explains what are art and nusic festivals like.

Finally, option 3) uses gerund, since -ing form functions as a noun (riding, hiking, camping).

it is the background information on the characters and setting explained at the beginning of the story. the exposition will often have information about events that happened before the story began. the exposition is often the very first part of the plot.