Did you know that the night sky is an illusion? Stars are so far away that it takes millions or billions of years for the light to shine on the Earth. This means that when we see the stars, the 'stars' we are seeing aren't actually there anymore. They have moved but since the light took so long to get to Earth, the stars aren't there. Scientists think that if we put a giant mirror 20 thousand light-years from earth and looked into it, we would be able to see the dinosaurs. This proves that time travel is possible and we just don't have the technology yet.

no

Explanation:

This absolutly does not prove that time travle is possible becuase.

If you tryed to put a meir 20 thousand light years away it would take you 20 thousand years to get it there, and you would see earth as it is after 20 thousand years of travle,

hope this

explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

the answer would be b i believe