The economy of a pastoral society is based on which of these activities

a) farming
b) foraging
c) raising livestock
d) manufacturing

C- would be the answer to the question above (pastoral) aka (posturing) is a number word for a group of animals. Livestock is a group of animals being raised for food.

C: raising livestock

Explanation:  

The economy of a pastoral society is based on raising livestock.

Pastoral farming refers to a form of farming which involves producing or raising livestock instead of growing crops. The livestock feed on natural grown grass and vegetation. Examples are raising beef cattle, raising wool for sheep, diary farming and so on. Some pastoral farmers grow crops for feeding the livestock.  It is also known as livestock farming. Pastoral farmers are called graziers.

b.have there own function.