How easy or difficult was it to find an example of each category? Which one was the hardest to find? Why?

Im is in a crowd of people at the mall looking for his girlfriend tammy, who was supposed to meet him for dinner. jim realizes tammy is across the room as he catches a whiff of her overpowering perfume, 'paris #6'. which process explains why jim is able to smell the perfume?

What element is able to combine with itself and hydrogen to form large molecules ?

Which describes a grizzly bear’s habitat?