Eating and digesting food maybe?
Yes all of your answeres are correct
Yes breakfast does have the energy that you need throughout the day for example i have skipped breakfast and i was very tired throughout the day. you should eat breakfast as a necessity every single day
Aerobic means with the use of oxygen, such as running. Anaerobic means without the use of oxygen, such as lifting heavy weights quickly.
Aerobic exercise will increase heart strength, and muscle endurance, but not bone strength.
To increase bone strength consume youre daily recommended value of calcium and vitamin D. Calcium cannot be absorbed by the body without vitamin D, people tend to forget that.