1. What are 4 things the excretory system and the digestive system have in common? (not functions but like organs) 2. What are 4 things the excretory stystem have that the digestive system doesn't? (Same thing not functions but organs)
3.What are 4 things the digestive system have that the excretory system doesn't? (Same thing not functions but organs)

The answer is b. hope this !

Gravitational force i believe

Yes yes yes very good

Mars and earth have quite a few things in common. both are  terrestrial planets, both are located within the sun’s  habitable zone, both have  polar ice caps, similarly  tilted axes, and similar  variations in temperature. and according to some of the latest scientific data obtained by rovers and atmospheric probes, it is now known that mars once had a  dense atmosphere  and was covered with  warm, flowing water.