Will give brainlist plzz answer
according to the nebular theory, how did the solar system form?

According to this theory, the Sun and all the planets of our Solar System began as a giant cloud of molecular gas and dust. Then, about 4.57 billion years ago, something happened that caused the cloud to collapse. This could have been the result of a passing star, or shock waves from a supernova, but the end result was a gravitational collapse at the center of the cloud.

the answer is d p: cell, q: organ, r: organ system, s: tissue