Which statements explain current theories about dark energy and dark matter?

Wich organism obtains its energy from dead or decaying matter

Consider the classification levels of a human. eukarya ,animalia ,chordata ,mammalia ,primates, hominidae ,homo ,sapiens .which is the most specific taxonomic level in the classification system above? a sapiens b homo c hominidae d primates

Which example would the nurse consider to be a part of systems thinking theory?