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What is a physical cause of spin echo?
Humus
Organic component of soil formed by the decomposition of leaves and other plant material, rich in nutrients.
Weathered Rock
Rock that has been altered in physical composition or chemical properties by environmental factors such as water, wind, or temperature changes.
Leaf Litter
The layer of dead leaves and plant material on the ground in forests and wooded areas, important for nutrient cycling and habitat for many organisms.
Dead Organisms
Refers to organisms that have ceased all biological functions that sustain life.
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