Examlex
Active manipulation of some aspect of the environment, in order to observe the effect on behavior, is known as:
Soil Texture
The feel of the soil, determined by the proportion of sand, silt, and clay particles within it.
Influence
The capacity to have an effect on the character, development, or behavior of someone or something, or the effect itself.
Earth's Surface
The outermost layer of the Earth, consisting of land, water, and where most terrestrial life exists.
Percentage
A fraction or ratio represented as a part of 100.
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