No they are not. Plants and animals are also at risk.
Manta rays don't have stingers. They have tails.
No, but it is these rays that cause sunburn in humans with pale skin.
It protects humans from UV rays. These are harmful rays of the sun.
gamma rays have a way stonger/higher energy level then x rays
Some examples of harmless sea creatures include jellyfish, sea stars, sea anemones, and certain species of small fish like clownfish or damselfish. These creatures generally do not pose a threat to humans and are essential parts of the marine ecosystem.
They can be, yes.
yes
No. The frequency of gamma rays is several orders of magnitude greater than that of any sound wave.
Gamma rays have the highest frequency among the electromagnetic spectrum, followed by X-rays and ultraviolet rays.
The ozone layer protects us from harmful ultra violet(UV) beams
These are ultraviolet rays, x-rays and gamma rays.
Earth protects by blocking UV rays. These are harmful rays of the sun.