Answer:
The chemical and physical functions of the brain and how they work.
Explanation:
Psych is related to the mind and conscioussness, bio and biology are concerning the physical being and body. Therefore, combining them would be talking about both, hence how the brain (psych) works on a physical (bio) level.
Ergonomic
Non-toxic
Eco-friendly plastic
Well...it might be that old "supply and demand" factor. As one example: a corporation/rancher/farmer might have the "demand" and the immigrant might have the "supply."
Out of the passage the summarizing sentence is
Tommy knows that in a formal discussion, you must be acknowledged before speaking
Explanation:
The sentence talks about the formal manners that Tommy must be following as he is now elected into the students' council for the school which is an administrative position among the students.
He must follow the rules of a fruitful discussion so as to be acknowledged as a viable part of the group and have his voice heard among his peers in the council that he is elected to.
The passage goes into the descriptions of such manners that it is necessary to learn.
