I think it would be A) Emotions and ethics
The electromagnetic wave is self propagating, what I mean by that is, an electric field generates a magnetic field at 90 degree phase angle, and the magnetic wave you get as a result generates the electric wave at the same phase angle. The interchange of electric to magnetic and vice versa continues and lets the electromagnetic waves to travel without any medium. Quite interesting, really!
Answer: Dear Headmaster,
I have been wanting to let you know of some things that some students have been doing for the past week. There is a student in the 5th or 6th grade that has been flooding the bathrooms and taking away the soap dispensers in both the girl and boys bathrooms. There is also a couple of students from the basketball team who have been bulling other students and are planning on graffiti the school on Sunday. Please take care of these kids so that way kids still want to come to this school.
Sincerely,
your students
Physical activity or exercise can improve your health and reduce the risk of developing several diseases like type 2 diabetes, cancer and cardiovascular disease. Physical activity and exercise can have immediate and long-term health benefits. Most importantly, regular activity can improve your quality of life.
Hope it helps!
