Comparing pictures: C, D

Both photos show a lot of people having fun in different places: a savannah and a lake. The photos are similar in that way but, as you can see in photo C, people are relaxed, playing in the sand and some of them are swimming. On the other hand, in photo D people are more excited and enjoying the moment.
I think that the two pictures were taken in summer because people travel to a lot of places, some of them are places with water like beachs or lakes, and some of them travel to exotic places like Africa. So, the photos are similar in that way too.
In my opinion, I'd prefer to be in the first place because it's so relaxing and comfortable but, the second place are very cool too.