The objects in the top two pictures are Dutchweed, which is a kind of
plant growing on top of a pond of still water. It makes the water look
very dirty, but sometime it can form very interesting patterns like what
can be seen in an abstract painting. The objects of the two photos at
the bottom are dying plants. Again, they could be very fascinating when
I observed them with a relaxing mind. Does the last one look like a set
of broom?