Which of these statements best explains how fossil records provide evidence to the scientific theory of evolution?

a. they show how natural selection happened on earth by chance.
b. they show how organisms choose to adapt to changing earth conditions.
c. they prove that structure and location of remains of organisms depict past events.
d. they prove that natural selection always leads to greater complexity in organisms.
z

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-

Which liquid (h2o, h2o + soap, or h2o + salt) has the strongest cohesion and adhesion? (need now plz)