How is Earth's surface most likely to change in a place that experiences extensive animal activity? Sand dunes will be formed due to deposition of sediments.

Soil will loosen due to vast network of underground tunnels.

Cracks will appear in rocks due to freezing and thawing of water.

Rocks will break due to repeated abrasion and mechanical stress.

answer: a) a compound microscope has a greater magnification ability than a simple microscope.

explanation:

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.