A list of three or more materials or items is called a series. Short, choppy sentences can be combined into one long, clear sentence with a series.
We use a comma (,) to separate the ideas and the word and is used before the last word in a series.
![grammar1](https://smrt.sfo2.cdn.digitaloceanspaces.com/core/LMLA/KIDS/ENGL120Kids/unit06/Grammar%206-3/6-3g1.jpg)
The summer sky is clear. The summer sky is blue. The summer sky is beautiful.
The summer sky is clear, blue, and beautiful.
![grammar2](https://smrt.sfo2.cdn.digitaloceanspaces.com/core/LMLA/KIDS/ENGL120Kids/unit06/Grammar%206-3/6-3g2.jpg)
Apples are red. Apples are green. Apples are delicious.
Apples are red, green, and delicious.
![grammar3](https://smrt.sfo2.cdn.digitaloceanspaces.com/core/LMLA/KIDS/ENGL120Kids/unit06/Grammar%206-3/6-3g3.jpg)
Trees are good homes for squirrels. They are for birds and racoons too.
Trees are good homes for squirrels, birds, and racoons.