Answer:It would be all of them
Explanation: Because they all give ideas on how "could a school reduce its use of energy resources
I don't understand, what is the question you're supposed to answer?
Answer: SECONDARY CELL WALL.
Explanation: When cell wall grow,it becomes thickened,then it further deposits new layers of a different material (different from that of the primary cell wall) from where secondary cell wall is formed.
This secondary cell wall is made up of cellulose,hemicellulose,and lignin.
They function in providing additional strength,support, rigidity to cells and the larger plant.
