Which of the following body reactions is characteristic of the stress response? Pupils constrict Blood pressure increases Body temperature drops Heart rate decreases

simple The adrenal medulla secretes the hormone adrenaline. This hormone gets the body ready for a fight or flight response. Physiological reaction includes increased heart rate. Adrenaline leads to the arousal of the sympathetic nervous system and reduced activity in the parasympathetic nervous system.

Explanation:

answer:

i don't believe the ocean is purple, but it might once have been:

as for the sky, according to nasa:

"sunlight reaches earth's atmosphere and is scattered in all directions by all the gases and particles in the air. blue light is scattered more than the other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time."