How big is the biggest thing in the universe? a. 100 million miles across b. ten thousand decibels c. 80 million light years d. no one knows for sure

d. no one knows for sure

Explanation:

The universe is infinitely big. It goes on forever and ever, so no one knows what's in it. We might find something really big, but we'll never know if there's something even bigger out there.

i think that d. wind is the answer.   i missed the question when i answered a. currents.

its temperature is increasing. this causes molecular vibrations to increase.