Lichens look like moss. But they’re actually two organisms—usually fungi and algae—that live together in a mutualistic relationship. The fungi provide a sheltered place for the algae to grow and reproduce. What do you think the algae offer that the fungi can’t do?

occluded front i think

because it travels in smaller waves then all other colors, causing it to be the most visible color

option d : from a warmer substance to a cooler substance

according to second law of thermodynamic, heat flows from higher to lower temperature region. heat is the transfer of energy from an object at higher temperature to an object at a lower temperature. so energy flows from warmer to colder objects.