IN AN OASIS, WATER IS DERIVED FROM

• A. Bajada
• B. Underground ✓
• C. Syncline
• D. Sill

The answer to the question is: B. Underground

In an oasis, water is primarily derived from underground sources. The underground water is often accessed through wells or springs and is crucial for sustaining the lush vegetation and wildlife found in oases.

Oases are areas in deserts where water is present, allowing for the growth of vegetation and providing a habitat for various forms of life. The primary source of water in oases is groundwater, which is accessed through wells or natural springs. This groundwater is often derived from precipitation that has infiltrated the ground and become stored in aquifers beneath the surface. In some cases, water may also flow into oases from nearby mountains or highlands through underground channels.