This was the first film introduced that used sound

What is the purpose of biofertilizers? a reduce pollution b. reduce insect threats c. reduce erosion d reduce herbicide use select the best answer from the choices provided 0 0 0 0

There are no written records of the first migration of humans to the americas? true or false

Which is one factor that contributed to the rise of sikhism? a. the spread of christianity into india b. opposition to the hindu caste system c. objections to the five pillars of islam d. a return to polytheistic religion