Problem: Randomly generate a fact.

Random fact: as a source of light moves directly overhead of an object , the size of the shadow of that object will decrease


Problem: Randomly generate a fact.

Random fact: nature is the source of natural resources


Problem: Randomly generate a fact.

Random fact: different organisms reproduce differently


Problem: Randomly generate a fact.

Random fact:
as the thickness of an object increases , the resistance to damage of that object will increase