The correct option is D.
A natural law refers to a description of natural event that has been proved to be true without exception. Such a law usually generalizes a body of observation but can not explain why the observation occur. An example of a natural law is Newton's law of gravity, he observed that an object thrown up usually come down but can not explain the reason behind this observation.
17 plant cells is the number of cells the student can see
Scientific inference
<span>¯\_(ツ)_/¯</span>
Sun grows plants which feed animals or feeds the animals prey