Answer:
a theory or system of social organization that advocates the ownership and control of the means of production and distribution, capital, land, etc., by the community as a whole, usually through a centralized government.
Relic Boundary is the correct answer :)
The Harappa’s system of standardized weights and measures signified advance technology and an advancing civilization in the Indus River Valley. Remarkable accuracy in systems and tools of the Harappan people were demonstrated by fire-baked bricks which were consistently moisture resistant and uniformly sized.
The sun because it provides us energy
optical telescope (Hubble), X ray telescope ( Chandra) etc.
get around the Earth's atmosphere so that we can get a clearer view of the planets, stars, and galaxies that we are studying.
