Which definition best defines cardiovascular activity? How well your heart and lungs can supply blood and oxygen to your brain.

Anything that works your heart and muscles at the same time.

How well your heart and blood vessels can supply your muscles with energy.

Whatever causes your heart rate to reach the 50-85% Target HR zone.

Today’s readers have more scientific knowledge than readers of previous eras what effect does that have on their reading of science fiction stories

In me thou see'st the glowing of such fire that on the ashes of his youth doth lie, as the deathbed whereon it must expire consumed with that which it was nourished by. which theme do these lines best support? a. all people grow old and die. b. in old age, people grow like a fire. c. flames turn everything to ash d. fire glows and burns

Where is grendel? where does he go? what makes him go? will he return? what will he be when he returns? what do his origins and destinations have to do with his character?