Which of the following is a beast of burden?

Animal husbandry deals with
$I$. Breeding of livestock like buffaloes,cows,sheep,camels,etc.,that are useful to humans.
$II$. Rearing,catching,selling,etc.,of fish,molluscs,and crustaceans.
$III$. Breeding of fowls for human use.
Which of the statements given above are correct?

What should be done to obtain a pure line of animals?

Choose the correct statement regarding inbreeding.

Which of the following statements is incorrect?

The 'Pashmina' breed, which provides the most valuable wool in the world, is a type of: