There are many signs, this may help you with your answer https://www.drugabuse.gov/publications/principles-adolescent-substance-use-disorder-treatment-resear...
The answer is It’s Pacemaker !! It is also known as the SA node
Good communication, spending time together and solving their problems instead of always arguing
I have researched this and i am pretty sure that it would be A / butter , milk, and corn oil
False, the inventors claims were clearly not well tested
