Average cattle size over the past 100 years has increased steadily. Cows, on average, are more than 100 pounds heavier than they were a century ago. What is the most likely explanation of the increases observed in the cows?
Responses
AHumans have bred the cattle to have improved genetics that increase growth rates and mass.
Humans have bred the cattle to have improved genetics that increase growth rates and mass.
BIncreased water availability as water levels rise increased the growth and mass of the cattle.
Increased water availability as water levels rise increased the growth and mass of the cattle.
CDecreased competition with other mammal species in the wild has increased the aver-age growth rate of cattle.
Decreased competition with other mammal species in the wild has increased the aver-age growth rate of cattle.
DIncreased global temperatures have decreased disease incidence of the cattle, leading to their increased growth.
ONE ANSWER