Answer: The pond is slow, slower than the king, it can only move forward but the way it take’s pieces is diagonal. The knight has a move no other piece does, it moves like an “L”. The knight can “jump” over other pieces, that’s what make’s it special.
Explanation: Here is an example of the pond:
The pond is at e4 and want to move forward, the pond can only move up one square at a time, so the pond will go to e5.
When the pond is attacking though, it will be attacking diagonal. So the pond is on e5, attacking a piece on d5. The next move, the pond can take the piece on d5.
Here is an example of a knight:
Let’s say the knight is on e5, the knight has 8 squares to move to. C6, d7, f7, g6, g4, f3, d3 and c4. Notice that EACH MOVE WILL MAKE THE SHAPE OF AN “L”. The knight can take any piece on these squares, (if the knight is on e5).
Hope I helped!