Question

what is a geological formation of porous rock or sediment that store and transmits groundwater? a rock-river a subterra an aquifer a well

Explanation:

To solve this, we analyze each option:

• "a rock - river" is not a standard term for groundwater storage/transmission.
• "a subterra" is not a recognized term for this geological formation.
• "an aquifer" is defined as a geological formation of porous rock or sediment that stores and transmits groundwater.
• "a well" is a man - made structure to access groundwater, not the formation itself.

Answer:

C. an aquifer (assuming the options are labeled A: a rock - river, B: a subterra, C: an aquifer, D: a well)