Answer:
ii. Esophagus is the Answer.
Explanation:
Hope it helps you:)
A ! The body provides oxygen and nourishment etc etc
Answer: All the the above
Explanation:
theories-explain, organize, predict hypotheses-testable prediction operational definition-clear procedures used to define and measure research variables replication is important because it helps us reassure ourselves that our outcome was correct and to see if we must change our hypotheses or correct something in our experiment
