I think its either fungi or viruses
A) The source is probably not valid because it is based on an opinion.
He or she that wrote it did not go into a lab and see if the resources are true its just based on what he thinks it is.
Answer:
9 essential amino acids for requirement of children.
There are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine
Blood is blue before it reaches oxygen. this is why your veins are blue
