Read the paragraph. Preparation is the key to success when hiking. Hikers must research weather conditions and wear appropriate layers of clothing to avoid discomfort. Also, hikers must chart their course to confirm the availability of suitable trails. When packing, hike participants should select ample food and water for their adventure. Finally, phones and other communication devices should be charged and ready for emergencies.

What is the purpose of the details in the paragraph?

to develop the central idea of hiking preparedness
to compare the characteristics of different trail hikes
to describe hikers’ packs to help readers visualize them
to explain the importance of the hikers’ level of fitness