Answer:
Embryology is defined as the branch of biology and medicine that studies embryos and how they develop. The study of how human embryos develop from fertilization to birth is an example of embryology.
Explanation:
The erosion or disintegration of rocks, building materials, etc., caused by chemical reactions (chiefly with water and substances dissolved in it) rather than by mechanical processes
A testable hypothesis must be just that--testable. You must be able to provide evidence that your hypothesis can be proven true in order for it to be considered accurate enough for future use among scientists. This can be done through repeated experimentation.
The answer that seems like would best fit this graph would be "(4)Years"
