Environmental Science
The ratio of the mass of water vapour in a given volume (parcel) of air to the mass of the remaining dry air describes the:

Dew point
Absolute humidity
Relative humidity
Mixing ratio

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Environmental Science
In the food relationship where the lion eats the wild beast, and the wild beast eats plants

The lion is the prey and the wilde beast is the predator
The lion is the secondary consumer and the wilde beast is the primary consumer
The lion is the primary consumer and the wilde beast is the secondary consumer
The lion is the predator and the wilde beast is the prey

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