Old forge and watertown, located at nearly the same latitude in new york state, have very different landscapes. which factor is primarily responsible for these landscape differences?

Bedrock structure is primarily responsible for landscape differences.

Bedrock lies beneath the surface materials such as soil, gravel, sand and other sediments. It is a deposit of hard, consolidated, tightly-bound solid rock. It is the parent material for unconsolidated material and soil above thus influencing landscapes.