Maple Syrup Is A Solution.
Answer: Convection
Explanation: Cold water sinks because it is more dense than warm water.
Warm water rises because it is less dense than cold water.
Producers, because according to food pyramid, only 10% of energy is passed onto the next layer, where the other 90 is passed off as heat, so there must be more producer in order to sustain the ecosystem.
Usually if we are talking about needles and body fluids, They are usually put into a box that is labeled hazard! And they dispose of the materials in a special trash can! :) Hope this helps!
