Not sure what the choices are but a biotic factor is anything living.
1.Frost Wedging (Freeze-Thaw)
Water expands by 9 percent when it freezes. As it expands, it exerts up to 4.3 million pounds per square foot of pressure. Since water seeks low points, repeated freezing and thawing can lead to deep vertical fissures as cracks are extended downward. Cracks that allow entry of roots lead to similar wedging.
2.Crystal Formation
Crystal formation cracks rock in a similar way. Most water contains dissolved salts. When water in rock fissures evaporate, the salt concentration increases, which leads to crystallization. This occurs in arid regions where the humidity fluctuates widely, so that the salt can be redissolved and carried into new fissures.
hope i helped
Answer:
Option B, 
hectoliters
Explanation:
As we know that in one hectoliter there are ten decaliters
hectoliter 
decaliters
or
decaliters 
hectoliter
For converting any small unit into a large unit it is to be divided by number of units in large unit.
Thus,
decaliters in terms of hectoliter is equal to
Hence, option B is correct
