I think the answer is D. ( or supported by observations ). Because theories change over time, they both NEED to be proven, they do NOT go off of consensus, but they do NEED to be supported by observations.
I hope this helps.
Volume is the amount of space that a substance or object occupies while in a enclosed space. The units used are millimeters.
Answer:
to continually produce energy,your organs need oxygen and the oxygen is carried in your red blood cells.
The iron-nickel alloy melts cause of the hot temperatures