Removal of fleece from sheep is known as ____________ .

(a) Shearing

(b) Rearing

(c) Rolling

(d) None of the above.

The correct answer is (a) Shearing.

Shearing is the process of cutting off a sheep's woolly fleece. It's essentially a haircut for the sheep and is typically done once a year, usually in the spring, to keep the animal cool during the summer months. 

The other terms refer to different concepts:

• Rearing is the process of raising and caring for the sheep.
• Rolling refers to the practice of rolling up the fleece after it has been sheared.