Carbon dioxide+water (with sunlight)= glucose +oxygen
This is known as parasitism.
In biology, parasitism is a relationship between species, where one organism, the parasite, lives on or in another organism, the host, causing it some harm, and is adapted structurally to this way of life.
(C) earth's outer iron core
this is because iron is magnetic and therefore forms a strong magnetic field
It would be a catalyst. They help increase the rate of chemical reactions.
absorption may absorb light from the beam of light and scattering may change the beam of light's direction