Wool is obtained from sheep and certain other animals, including cashmere from goats, mohair from goats, qiviut from muskoxen, angora from rabbits, and other types of wool from camelids
Wool is distributed all over the world from sources located on every continent except Antarctica.
Wool Merino sweaters can be purchased from many different sources online. Companies like J Crew, Land's End, and LL Bean are just a few brands that produce Merino sweaters.
Wool is produced all around the world. There are several types of wools coming from different sources. For example cashmere wool, lambswool, camel wool, sheep wool etc. Here is few countries which are major producers for wool: India Pakistan China
Wine, wool, cattle, fishing
Wool is produced in Australia and many other countries.
The modifying word you may be looking for could describe the source of the fleece used in the wool. Soft wool comes from baby alpacas, llamas and yaks. There may be other sources, depending on your definition of 'soft'.
There are many different types of commercial wool available for knitting and crocheting. The types can be pure wool or wool blends. Each type of wool varies by the animal that the wool comes from (sheep, goats, alpaca, etc.), the grade/quality of the wool, how the wool was prepared/spun, and if the wool is blended with another material such as acrylic. Even with non-commercial wool there would be many variants based upon the type of animal that the wool came from, the grade/quality of the wool, how the wool was prepared and spun, the skill of the person preparing the wool. I have purchased home spun wool that varied greatly in thickness thoughout the entire skein making it difficult to use in a pattern where exact sizing is important.
Expensive is a relative term, so what may be expensive for someone else may not be expensive for you. There are too many types of wool, many stages of wool and many objects made from wool to be inclusive or even guess at the answer that you want.
There is no average, since wool comes in so many forms.
Flannel originally came from wool and originated in Wales, though the word itself is believed to be French in origin. Today flannel fabric is made from wool, cotton, or even synthetic sources.
Wool commonly comes from the fleece of sheep, and certain other animals. Silk is the unwound silk thread that the silkworm secrets round itself as a protective cocoon before it changes into an adult.
There are many things you can make from wool some of the most common are hat, carves and Jerseys. The wool comes from sheep or goat skins.