Peat moss is used for transporting plants to distant places because

The correct option is "it is hygroscopic".

Here is the step-by-step explanation of why this option is correct:

1. Understanding Peat Moss (Sphagnum):
Peat moss, primarily derived from the genus Sphagnum, is a moss that grows in wet, acidic environments like bogs. The structure of Sphagnum moss contains large, empty, dead cells called hyaline cells alongside smaller living photosynthetic cells. These hyaline cells have pores in their walls that can absorb and hold a massive amount of water.

2. What does "hygroscopic" mean?
An substance is described as hygroscopic when it has a strong affinity to attract and hold water molecules from its surrounding environment, either through absorption or adsorption. Due to the presence of hyaline cells, peat moss is highly hygroscopic, capable of retaining water up to 20 times its dry weight.

3. Role in Transporting Plants:
When living plants, seedlings, or cut flowers are transported over long distances, they are highly susceptible to drying out (desiccation) and dying. Because peat moss is highly hygroscopic, wrapping the roots or packing the plants with moist peat moss maintains a consistently humid and wet environment. This prevents the plants from losing moisture during transit, ensuring they remain alive and fresh upon arrival.