I think its D but i'm doing this as well so don't like rely on this i might come back and tell you if it is or isn't
It is the dependent variable.
The macromolecule that is present in albumin would be proteins. Also, it has traces of lipids and carbohydrates. The albumins are a family of globular proteins, the most common of which are the serum albumins. All the proteins of the albumin family are water-soluble.
<span> limiting factor </span>
<span>A limiting factor is anything that is in short supply in the environment and therefore limits life processes</span>