How does a grassland follow conservation of mass and energy

In the context of the neural impulse, which of the following is true about the depolarization of neuron membranes?

Ineed to know why d is the correct answer asap

Matthew decided he wanted to hike up mount everest. on his way to the top, it began to snow and the temperature dropped to -10°f. matthew forgot to wear a heavy jacket so his body began to shiver beyond control. in this case, matthew's body shivering is the to a drop in temperature. * 0 points reflex stimuli responce environmental facto