Answer:
The principle of superposition
Explanation:
The principle of superposition tells you how rock layers are laid.
Answer:
Many things, such as weather change, migration cycles being thrown off, droughts, floods, and more
For a scientific theory to be valid, i<span>t must be well tested, it must be widely accepted, and it must explain the observable facts.
A scientific theory is confirmed through observation and are usually widely accepted. </span>
