Which feature indicated a period of heavy bombardment followed by a period of low bombardment in our solar systems?

The low crater density of the lunar maria.

Crater density and the lunar marina.

Explanation:

The heavy bombardment or the lunar cataclysm is a hypothesis that said to have been occurred about 4.1 to 3.8 billion years ago and it corresponds with the Eoarchean periods of the earth which have been found as ancient crater remains in earth surface.  During which the asteroids were theorist to have been collided with the terrestrial earth and evidences for this comes of the radiometric dating pf the rocks that were formed during the collision of the asteroids and the comets.

Answer islamic scholars made advancements in technology, literature, philosophy, mathematics, astronomy, and the arts during this time period;