Understanding density helps you predict whether an object will sink or float.
C
The last three are correct
A decrease in dissolved oxygen.
This is because oxygen is a byproduct of photosynthesis. If the plants are in water, some of the oxygen they produce will become dissolved in it. Without those plants, you have less dissolved oxygen.
Movement : kinesis
Behavior: It is sometimes called a roly-poly due to its ability to roll into ball when disturbed
