Linda takes her pet German shepherd to a dog park and sees many different breeds of dogs. What is the term for any difference between individuals of the same species?
A. evolution
B. adaptation
C. population
D. variation

The correct answer is option D. "variation".

Explanation:

Variation is a term used to describe the phenotype differences among individuals of the same species, such as the differences among the different breeds of dogs. There are two types of variation, inherited  and environmental variation. The first one results from the different genes in the offspring that are passed from the parents, and environmental variation results from the exposure of different conditions in the surroundings where individuals live.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?