Environmental Science
Thermal belts are:

Pockets of warm air resting on a valley during the afternoon
Cold, below-freezing air found at the top of a mountain
Warmer hillsides that are less likely to experience freezing conditions
Pockets of cold air resting on a valley floor at night

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Environmental Science
Which one is true?

commensalism when the interaction is useful to both the populations
symbiosis when the interaction is useful to both the populations
commensalism when none of the interacting populations affect each other
symbiosis when neither population affects each other

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