Why does weather vary from day to day? A. because cold fronts are always followed by a series of colder fronts, before a warm front returns

B. because weather is a complex interaction among many different variables that are constantly changing

C. because the rotation of the Earth causes the atmosphere to expand and contract as it nears the Sun or Moon

D. because the Sun's energy heats all parts of the Earth evenly but does not heat the atmosphere

Imagine a person stepping on a pin and pulling his or her foot away. look at the reflex arc of this scenario below. which statement best describes the image? a)the sensory nerve carries the signal from the effector to the interneuron, and the motor neuron carries the signal to the receptor. b)the motor nerve carries the signal from the receptor to the interneuron, and the sensory neuron carries the signal to the effector. c)the sensory nerve carries the signal from the receptor to the interneuron, and the motor neuron carries the signal to the effector. d)the sensory nerve carries the signal from the receptor to the motor neuron, and the interneuron carries the signal to the effector.