Question

Steep cliffs also develop in sedimentary ____________ which are both strong and resistant to weathering. Same is true of ____________ , but only in arid climates. In contrast, ____________ generally form broad, gentle slopes because they are much weaker and erode quite easily.

Answer 1

Missing answers respectively are, sandstone, limestone and shale.

Step-by-step explanation:

Sandstone has medium sized grains thus are not easily weathered.

Limestone is formed due to the calcium in dead plants and animals over time thus solidifies into a rock, limestone breaks down easily when put in continuous contact with water or liquid substances but is quite tough in dry or arid conditions.

But shale on the other hand is a very fine grained rock and is easily weathered away due its mud like and clay like clastes forming very gentle terrains unlike the rocks above.