John used smothering as the method to control the harmful invasive plants in his orchard. Smothering is an example of a manual method of control and it works best in a small population of invasive species. Smothering involves covering the invasive species with a barrier that is highly impenetrable for one growing season in order to prevent these species from thriving in the environment.
There water has a lot of salt in it, so it would be denser. People float better when the water is denser.
I'd say B.) Increasing the voltage of the battery.
Use of lubricant
Use of ball bearers
Use of streamlined body
Use of graphite
