Which of the following describes an interaction between the endocrine system and the excretory system?
A The pancreas regulates blood glucose through hormones.
B The pancreas produces digestive juice to break down nutrients.
C The adrenal hormones regulate excretion of salt through urine.
D The adrenal hormones produce adrenaline in response to excitement.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate