The crossword solution for the term 'YIELDS TO GRAVITY' is SAGS, which stands for 'Subsidence Above Ground Level'. Subsidence is a geological process in which the ground surface gradually sinks due to the weight of the material above it. This process is caused by a variety of factors, including erosion, tectonic activity, and the effects of gravity. In some cases, subsidence can be accelerated by human activities such as mining or construction. Subsidence can cause significant damage to buildings and infrastructure, and can also lead to flooding and other environmental problems.