The closeness of a measurement to the actual value of what is being measured

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled