D. <span>controlled
is the right answer because a</span><span>n </span>experiment<span> in which an observer tests a hypothesis by looking for changes carried by alterations to a variable.</span>
<span>The Earth rotates once in about 24 hours with respect to the sun and once every 23 hours,
56 minutes and 4 seconds with respect to the stars. Earth's
rotation is slowing slightly with time; thus, a day was shorter in the
past.</span>
I think it’s D. A large amount of humans.
And B. Temperatures of 5-10 degrees. I’m not sure sorry if it’s wrong.
A dissection microscope<span> is light illuminated. The image that appears is three </span>dimensional<span>. It is used for dissection to get a better look at the larger specimen. You cannot see individual cells because it has a low magnification. Or just call it a dissecting microscope</span>
