Why are the Prairies called granary of the world?
Prairies are called granary of the world because it producesand exports the wheat in the highest amount in theworld.
Why has animals rearing developed on large scales in Canada and in US?
We know, must parts of Canada and US lies in central lowland of America where plenty of grasslands are found. These grasslands are favorable for the rearing of both herbivores and omnivores animals. Animal husbandry is most suitable occupation here. So, animal rearing has developed on large scale in Canada and in US.