Which of these is not currently a source of usable energy? A The sun incorrect answer
B The moon incorrect answer
C Heat from within the earth's crust incorrect answer
D Running water

Charlie is easily winded during soccer practice and wants to improve his cardiorespiratory fitness. which activity would be best for him to choose? lifting weights walking from one class to another running in a 5k race riding a bike at a leisurely pace

Which two levels of the spine that can undergo flexion and extension?

What type of medicine to people take if they are lactose intolerance