Question

The sites of pre historic period are called industrial sites because
a) people lived here for a long time.
b) heaps of broken stones were obtained in these areas.
c) stone tools were found around rocky areas.
d) sites were discovered along the banks of rivers and lakes.​

Answer 1

Answer:

Human prehistory, also known as pre-literary history,[1] is the period between the use of the first stone tools by hominins c. 3.3 million years ago and the invention of writing systems. The use of symbols, marks, and images appears very early among humans, but the earliest known writing systems appeared c. 5,300 years ago and it took thousands of years for writing systems to be widely adopted. In some human cultures, writing systems were not used until the nineteenth century and, in a few, not even until the present. The end of prehistory therefore came at very different dates in different places, and the term is less often used in discussing societies where prehistory ended relatively recently.