Robin carries the trash from the house to the garbage can outside. Which statement best describes the science of what he did? He did not have to work because garbage is light.
He used energy to carry the garbage.
He would use less energy if he were to move the garbage faster
He caused the garbage to have potential energy when it moved.

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.