He is sad and worried because the loved his grandkid a lot and that’s his day one so he love him a lot
C. Education beyond high school versus education beyond college because in the other examples you can't really use those topics because there isn't really much about them, but in example C. you can tell the two similarities in both the high school and college, and you could put there differences. Hope I helped!
The fish and birds have to adapt to the changes of the water during each season.
Also during the winter when the water freezes people like to go ice fishing and when they cut holes in the ice and take out the ice that was cut the river loses water.
Emergency vehicles must not use their sirens after 11 pm