Answer:
Trough – the lowest point below the rest position. Amplitude – the maximum displacement of a point of a wave from its rest position.
The answer is D, all of the above.
They are related because the high pitch sounds correspond to the sound waves which give high and low frequencies.
Answer:
e. secretion, absorption and chemical protection
Explanation:
Epithelial tissues is responsible for the protection of the skin, absorption of nutrients during digestion and secretion of waste materials. These tissues form covering to all body surfaces. They also perform a variety of other functions such as excretion of waste substances, filtration of air from dirt and particles and clean the air that is inhaled, diffusion, and sensory reception.