A greenhouse is a building where plants can be grown. It has walls that allow light and air inside. The amount of water and nutrients the plants receive can be controlled.A farmer wants to make his greenhouse into a good model for testing how crops will grow in a large field. Which is the best way to do this?
Answer
A
remove the walls of the greenhouse
B
put windows around the field to make it like the greenhouse
C
re-create the soil and water conditions of the field in the greenhouse
D
place tiny models of farm equipment in the greenhouse
Explanation
A useful model should match the conditions that affect crop growth in the large field. Re-creating the field’s soil and water conditions in the greenhouse lets the farmer test how crops respond to those important factors. Removing the walls or adding tiny equipment models would not make the growing conditions more like the field.
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