What is most likely in the envelope?

greywater is gently used water from your bathroom sinks, showers, tubs, and washing machines. it is not water that has come into contact with feces, either from the toilet or from washing diapers. greywater may contain traces of dirt, food, grease, hair, and certain household cleaning products.

5 because 2, 3, 4 are incomplete. it could be 1, but i say its 5

if you believe in yourself you wont need education or training  

as he is mainly a visual learner, he will use concept maps in order to structure his new knowledge. concept maps will him visualize the ideas and the connections that exist among them and will him remember them better and more easily.