Environmental Science
Our seasons are caused by:

Only (b) and (c) are correct
All of these
The length of the daylight hours
The angle at which sunlight reaches the earth
The changing distance between the earth and the sun

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Environmental Science
Which statement(s) below is/are correct?

Fog can be composed of ice crystals
Valleys are more susceptible to radiation fog than hill tops
All of these
Without the summer fog along the coast of California, redwoods would not grow well there

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