D. Environmental
because there is a lot of air pollution
Answer:
School should not use plastic water bottles as one point is they are wasting money that can be spent on more water fountains for refilling reusable water bottles, as the manufacturers of water in bottles are selling the plastic not the water. It is the same water in your tap however it is proven tap water has less badness then bottled water. Plus, most schools do not recycle and many kids will need water whilst they are at school.
I want to say you’re asking which muscle is smoother when contracting? I’d say skeletal
