Q: Fact: solar energy is an inexhaustible resource
Question: Which of these can you use as much as you'd like of without diminishing it at all?

A: sunlight

Q: Fact: looking directly at an eclipse of the Sun causes harm to the eyes
Question: looking directly at an eclipse of the Sun causes harm to the

A: organic light receptacle

Q: Fact: waxy leaves are used for storing water by some plants
Question: Wax is on some plant leaves for what purpose?

A: keep the ongoing hydration

Q: Fact: a seismograph is a kind of tool for measuring the size of an earthquake
Question: a seismograph is a kind of tool for measuring the size of

A:
terra plate displacements