Answer:
A functional group changes the structure of a compound but does not alter its chemical properties
The build up in the child's ear prevent sound from reaching the eardrum.
Answer would be
E
Hope this help happy Saturday
That would be : adenine, thymine, guanine, and cytosine.
Carbon is one of the most common elements
Can form bonds and double bonds with up to 4 other atoms, including other carbon atoms
If you add more elements and you can create amino acids, and that is the base of all proteins.
If you need more help on this, watch some videos by Neil Degrasse Tyson. World-renown astrophysicist (and my idol) who does lots of talks about things just like this.<span />