observing models is a scientific greed of to test different combinations of stuff like experiments dealing with an unknown virus or poison ..that's why they have scientist , so they can testify on any experiment that is unsolved and unknown yet , so that's how they have models to help, to do experiments and test
Answer: A. Gravity is the force that pulls all things together
Answer:
Answer:B Or the second one
Explanation:
it all stayed consistant.