Which of the following describes the mechanical advantage of a machine?

a. the number of times that a machine multiplies the effort force

b. the number of times a machine multiplies the resistance force

c. the number of times a machine reduces the resistance force

d. the number of times a machine reduces the effort force

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.