4 Every tree has its own characteristics. Thus, selecting the right tree for a particular spot is not always easy.
5 National income is the total of all income in a nation during a set period.
6 There are a few things to remember when you take exercise.
7 Dehydration is common in very young children, people who over-exercise, older people if the weather is very hot, and those suffering from diabetes.
8 Choose a diet which is high in fruit and vegetables and low in fats and sugar.