Teachers have to be very when working with students who have varying needs.

Teachers must be very patient when working with students who have different needs.

Explanation:

Because children with different needs have different complexities, the teacher must be patient and try twice as hard to teach children, since it takes more work to learn individually.

that there are poor conditions

the correct answer is:

this is an example of the writer telling through description rather than showing through dialogue.

sometimes writers like to explain explicitely what's happening instead of adding dialogues of the situations., which is the case in this passage,