What does the term "breathing rate" mean?
a. the number of breaths taken during a specific period of time.
b. the amount of air that is inhaled into the lungs with each breath.
c. the amount of oxygen traveling in the body during exercise.
d. the change in breathing that occurs as a result of exercise.

yes its good if for a love riddle. and the answer is a heart.

hope this

-goldenwolfx

ian mortimer in his book "the time traveller's guide to elizabethan england" uses a narrative in his style, which successfully conveys a clear description of the life in england in the 16th century. he writes in second person, which makes it comfortable to reader and easy to understand, he captures the readers attention with views of the landscape, the streets, the people including rich and poor. he also depicts some cultural traits from how people behave, eat or what they wear. his descriptions range from the social, economical, the political power to the examples of the life of common people. it could be tell that this book is about social history rather than a   novel.