Here are the answers to your questions:
Question 1
A) Why is the classification species not considered a group?
Answer: Each species is a separate type of organism.
Question 2
A) Which taxonomic classification level is the most broad (i.e., the highest)?
Answer: domain
Question 3
A) Charts, tables, drawings, and graphs are all types of
Answer: models.
Question 4
A) What makes the kingdom Protista unique?
Answer: Protists are single-celled.