fact and question: a tree growing a tree-growth ring occurs once per year
Question: what is a simple way to determine the age a tree?

What's the answer?

answer: by counting its round inner markings


fact and question: humans changing an environment sometimes causes that environment to be destroyed
Question: What activity changes the local environment the most?

What's the answer?

answer: over-logging


fact and question: electric devices require electrical energy to function
Question: A computer needs what to be functional

What's the answer?

answer: positive ions


fact and question: most predators live in the same environment as their prey
Question: Lions eat animals

What's the answer?

answer:
in the same environment where they live