Naturally occurring solid material from which a metal or valuable mineral can be profitably extracted
zinc, tin
I believe the answer is a.
Differing physical forces is the correct answer :)
C) mountains
I just did this and it is the right answer
There are total 12 secton, whereas each has a length of 3/4 yards. We just have to multiply 3/4 with 12. It is also equivlent by adding 3/4 12 times.