The fundamental unit among them (not derived) is :
The answer would be letter a
Phylum, it is the second largest group.
An hypothesis is an educated guess whereas a theory has supporting evidence to help prove the point to be correct. (I THINK this is right)
An object is in motion if its distance relative to another object is changing. To tell if an object is moving, you use a reference point. If an object's distance from another object [reference point] is changing. A place or object used for comparison to determine if something is in motion.
I'm not too sure if this is what you needed go know, I hope it helped
