Based on current information, cosmologists expect the universe to
stop expanding and begin to shrink in size
continue to expand and cool forever
gradually stop expanding, pause, and then resume expanding
continue to expand and heat up forever
remain at its current size

continue to expand and heat up forever

Explanation:

The cosmologist considers the expansion of the universe in a simple law that is called the Hubble law, which states that the galaxies are growing far away firm the center at a relatively low rate that is 44 miles per second. And thus it's slow it is forming a uniform expanding cosmos of dark matter. The dark matter drives the universe as it expands and provides energy for the development of new galaxies.