Asymbol is always a or material object representing

1. Robert  is  friendlier  and  more  enerjetic  than  his  brother  Richard.

2. Rita  reads  the  newspaper  every  morning,  and  she  writes  letters  every  afternoon.

3. Ronald  gave  his  sister  flowers  and  perfume  for  her  thirteenth birthday.

4. My car is bigger and more powerful than my neighbor's car.