Read the following sentences: "When muscles work, they somehow communicate with the brain, liver an other organs. Until recently, scientists weren't sure how muscles sent those messages."
As used in the passage, communicate means
o be in touch with
to trade cells
use IL-6
to fight with

they both can be important it depends on how you view them. wanting love can consume someone it shouldn’t be forced or it won’t work. caring about love is just a acknowledgment of how love work. : )

since you have not provided the options here i   am going to give you general overview about hormone.hormone are actually the part of endocrine system in our body and produced by the endocrine glands. the hormones act like a chemical messenger   within human body. once produce by the glands they   travel through the blood stream and reach at specific or target tissue and organs   which result in control of our body function. the hormones are specific in their work and work on only the targeted tissue or organ   . with the of hormone endocrine system regulate the heart rate , metabolism, our mood and   growth as well as the development and even the sleeping cycle etc. they actually are the messenger for body cell and organs .

the second awnser

explanation:

because it is for complex problems