How do paragraphs 10-12 refine a key concept about space junk collisions?

All space junk is the result of us launching objects from Earth, and it remains in orbit until it re-enters the atmosphere. ... Some space junk results from collisions or anti-satellite tests in orbit. When two satellites collide, they can smash apart into thousands of new pieces, creating lots of new debris.

Explanation:

zheng he was a chinese explorer who lead seven great voyages on behalf of the chinese emperor. his seven total voyages were diplomatic, military, and trading ventures, and lasted from 1405 – 1433. however, most historians agree their main purpose was to promote the glory of ming dynasty china.

explanation:

d)to gain support for the independence movement.

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