1.
Food-gatherers
and hunters. They live faraway from rural-urban way of life and possess as
simple type of organization.
2.
Permanent
Settled Cultivators. They practice different kinds of agricultural cultivation
working in their own fields and of others. Their organization is much developed
and highly complex.
3.
Craftsmen.
Some may retain their traditional crafts and represents their tradition as a
whole.
Answer:
Explanation:
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5 milion and mostly from the old age specificly 50 and above
"The mass of Substance C is five times the mass of Substance B", the given statement is correct.
Answer: Option D
<u>Explanation:</u>
As Jessie added 16 gm. of Substance A to 4 gm. of Substance B Obtained certain amount of Substance C which can be calculated as follows:
amount of Substance C = Substance A + Substance B = 16 + 4 = 20 gm
Therefore, 20 gram of Substance C was obtained. Here, fourth statement is correct which says the mass of Substance C ifs five times the mass of Substance B to justify this, see the below: