Answer:
Definitely the second one ;D
Explanation:
The correct answer is:
An understanding of the number and size of leftover planetesimals in the early solar system.
The giant-impact hypothesis proposes that the Moon was created out of what was left of a collision between Earth and an astronomical body the size of Mars, around 4.5 billion years ago, in the Hadean eon. The heavy bombardment was a period when leftover planetesimals hit planets during the solar system's first hundred million years.
1. The fact that all Incan architecture shares similar design principles suggests C. unity. - they all wanted to be the same because they were a union
2. The towers of St. Basil's Cathedral in Russia are symbolic of C. eight battles.
3. The Greek arch can typically be seen in all of these, but let's say A. bridges.
the answer to that is false
It promoted the spread of information by increasing the number of books in europe