The answer is A. It is gotten from eating food.
<span>When Walter visited Thailand during his vacation, he was surprised to see green water at a beach. because. It is because </span><span>the ocean over this region has a high concentrations of phytoplankton from blue-green to green, depending upon the type and density of the population. The more phytoplankton in the water, the greener it is. </span>
No they do not have a backbone
