Which two factors have the most influence on
the development of landscape features?
(1) bedrock age and weathering rates
(2) bedrock structure and climate variations
(3) rate of deposition and thickness of the
bedrock
(4) rate of erosion and fossils in the bedrock

The two factors which have the most influence on the development of landscape features are:
2. Bedrock structure and climatic variations
4. the rate of erosion and fossils in the bedrock. 

Landscapes are generally changed by weathering and climatic events. For example, sandstone is softer than basalt so the same climatic event will cause different rates of weathering. A flash flood will break away greater chunks of the sandstone than it will of the basalt. Wind is another important means of weathering away stone and rock into to the interesting shapes found in buttes and mesas.

A