1. a. <span>is a possible explanation for events using prior knowledge
An inference </span><span>is a possible explanation for events using prior knowledge, therefore, inference is an educated guess which can provide a logical reasoning to an object, phenomenon or circumstance.
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<span><span>2. d. the amount of time ...
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</span>Since the amount of time can't clearly be controlled but only observed the other factors which is water, soil and type of plant can be manipulated in the study.
sunlight is a reactant in photosynthesis
A. Compounds have entirely different chemical properties from the elements that make them up.
Nutrients
If that's not the answer maybe it can be amino-acids
