Answer:
Salah Negara cok, disini inggris
The pointy things that hang down from the cave's ceiling are stalactites. (A)
The pointy things that grow up from the cave's floor are stalagmites.
(I imagine wearing shorts and hiking through tall grass in the Summer, and I say to myself "When the Mites go up, the Tights have to come down.".)
b.seven-day is the correct answer
The answer is called the Nazca plate boundary