Ascientist observes a geyser erupting. Which two objects must be interacting beneath the surface? well and spring
O spring and magma
O magma and groundwater
O groundwater and unsaturated zone

substitution is the answer in this case

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

i got you i did it ya know what it is just needing to fill this in for a quick task!