Describe the term aquifer

an aquifer is an underground layer of water-bearing permeable rock (more info below)

Explanation:

aquifers come in the following two types: unconfined and enclosed. unconfined aquifers are those in which water rises from the field immediately above the aquifer. a aquifer is an natural sheet of water-bearing permeable geological, a geological crack or unconsolidated substance (gravel , sand or silt). Groundwater may be collected using a pump. The analysis of water distribution in aquifers and the classification of aquifers is referred to as hydrogeology. other words for an aquifer would be formation, geological formation, natural depression, natural elevation finish. A natural underground area where large quantities of ground water fill the spaces between rocks and sediment. An underground layer over an aquifer that is impermeable or significantly less. permeable than the aquifer below it.

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the answer is b. apsidal precession

a. it led to stricter immigration laws.