The four astrological elements, fire, earth, air and water, represent a type of energy that defines one's temperament.

The twelve signs are divided into these four elements by what are called triplicities.

In other words, for every element there are three signs that correspond to that element.

When studying your Sun, Rising and Ascendent signs it is best to find signs representing different elements, which creates a more well-rounded persona.

If your chart is heavy in one element, those qualities will be strong for you. Likewise, if your chart is low or deficient in a certain element, the qualities of that element will be difficult for you to identify with and express.

Ideally, when partnering with another in work or family, one should look for elements that compliment their chart.

For example, if you are very strong in the fixed signs, but low in mutable signs you should have more people in your life who perhaps have less fixed signs, but definitely more mutable signs in their chart.