Answer:
Wilting point
Explanation:
Wilting point is defined as the minimum amount of water in the soil that the plant requires not to wilt. If the soil water content decreases to this or any lower point a plant wilts and can no longer recover its turgidity when placed in a saturated atmosphere for 12 hours.
A current In fluid that results from convection.
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Grass would be a producer since it uses Photosynthesis to make its own food and a cow would be a consumer