[FW.02]The pictures below show four Earth features.

Which of these features are formed by underground reactions between acid in groundwater and limestone?
A) 1 and 2
B) 2 and 3
C) 3 and 4
D) 1 and 4

FW02The pictures below show four Earth features Which of these features are formed by underground reactions between acid in groundwater and limestone A 1 and 2 class=