What do scientists call the theory that the universe will shrink in the future?
a.
collapse theory
c.
blue-shift deterioration
b.
the big crunch
d.
the big collapse

The correct answer is B. The Big Crunch.

Explanation

The Big Crunch theory is an astronomical theory that refers to the final destiny of the universe, it is said that the universe would end with a great implosion, that is, that all the objects that make up the universe will attract each other and the universe and objects in it will shrink. This theory is related to the theory of the Oscillating Universe, which states that the universe after that great implosion, explodes again as it happened in the Big Bang, causing a cycle of explosion and implosion. So, the correct answer is B. The Big Crunch.