Air, water, some kind of food or sustenance <span />
According to the PHS, the term "significant financial interest" includes royalty income paid to an investigator except if that income is from the investigator's current employing institution.
A forest ecosystem can support a limited number of bears. This is because available energy is lost from one trophic level to the next. (flies, trout, then bears)
You can make a table with each sun/star and plot them by color/heat. I hope this helps!