Multitouch screens sense and respond to select one: a. surface pressure measurements. b. gestures such as a finger-spread or pinch. c. none of these. d. radio waves.

not sure if this what   you'r looking for would be percent composition

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.