Answer:

it's not as simple to explain but to get an idea the black holes might collide with each other and will become unstable and might start swallowing things

IF A UNIVERSE COLLIDE WITH ANOTHER UNIVERSE THAN,A BIG BLACK HOLE WILL BE MADE AND OTHER PLANETS,STARS OR ANY OTHER CELESTIAL BODY NEAR IT WILL EMERGE IN BLACK HOLE AND MAKE IT MUCH BIGGER,THIS WAY NOTHING WILL EXIST

NOW THINK HOW INCREDIBLE GOD IS TO MANAGE ALL THESE

PLEASE FOLLOW ME AND THANK ME SO I CAN INBOX ANYONE

ALSO MARK IT AS BRAINLIEST