How are musical instruments grouped?

by the wavelengths they produce

by how they produce pitch

by what they are made of

by their frequency

if the other one is wrong than i can help a little i took the test and tried what they are made of and that is wrong

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.

answer///alimentary canal/gastrointestinal tract.digestive (gi);