Question

write a short note on pre-history in 200words​

Answer 1

ANSWER-

Prehistory, also known as pre-literary history,[1] is the period of human history 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. 5000 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...

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Answer 2

Answer:

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities. Wikipedia

Explanation:

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