Answer:
Fossil record
Explanation:
Fossils are remains or traces of former life and not evolution. They are mainly formed from preserved hard parts of an organism but occasionally soft parts are also preserved. Fossils are normally found in sedimentary rocks.
D. the release of oxytocin during childbirth
Answer:
They test or measure something.
Explanation:
Primary research articles report on research that has been completed. Therefore, a primary research article will review and analyze studies, and will state the research question and hypotheses of the studies presented. A primary research article does not test or measure anything, but will report on studies that do.
Answer:
Hope the above picture might help you :)
