The answer is the first option "true." You could reserve minerals in till their value rises which will be more profitable for you. But, if and when technologies make it profitable to extract deposits formerly considered too expensive to remove.
Hope this helps.
Scientist study earth because earth is the place that we
envolved on and is the only planet in our solar system that is know
to support life and is the fifth- largest planet in our
universe.
Sorry I only know the first one
It becomes brighter because, THE CORE CONTRACTS, RAISING THE TEMPERATURE AND EXTENDING THE HYDROGEN BURNING SHELL OUTWARD. This stage is called the hydrogen shell burning phase and during this phase the star grows luminous.
