If an example is what you need i'll try my best to help. Say for example, you're sitting in class and you're doing a group project and you want your best friend to do it with you but (s)he thought you had meant that you wanted to do it with someone else, because of poor body or facial language.
Does this help at all?...
<span>a. Too little potassium.
Potassium is very important for having healthy muscle tissue. Together with an intake of two litres of water a day, potassium makes your kidneys work fine.</span>