Which earth system is unchanging?

answers
geosphere; rocks and land are stationary
atmosphere; the air is always present
hydrosphere; water is found in the same locations
none; all systems change from natural and human causes

which is an example the atmosphere interacting with the geosphere?

answers:
rain washes loose sand into a lake

clouds block light from the forests

animals add carbon dioxide to the air

water provides oxygen for animals to breathe