Which of the following is a potential explanation to resolve the Fermi paradox?
A. The numbers in the Drake equation are incorrect.
B. There is actually life on the Galilean moons of Jupiter.
C. There are fewer stars in the universe than we think there are.
D. Aliens are intentionally isolating us or refusing to communicate with us.

i think the answer would be reserve.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.