All of Earth's Life-Forms Are Based on

question 13

Multiple Choice

All of Earth's life-forms are based on

• A) hydrogen.
• B) nitrogen.
• C) oxygen.
• D) carbon.
• E) phosphorus.

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Definitions:

Strip Cropping

An agricultural practice where crops are grown in alternating strips to reduce soil erosion and encourage biodiversity.

Contour Farming

An agricultural technique where farming practices like plowing are done parallel to the contours of the land, aimed at reducing soil erosion.

Terracing

The practice of creating flat platforms on sloped land, often used in agriculture to reduce soil erosion and support water conservation.

Water Pollution

The contamination of water bodies (e.g., lakes, rivers, oceans, aquifers) by harmful substances or heat, negatively affecting aquatic ecosystems and human health.