Fixation due to random genetic drift is more rapid in blue-eyed persons.

a. small populations.
b. the punctuated equilibrium model of evolution.
c. the formation of a new species.
d. tropical environments.

b. the punctuated equilibrium model of evolution.

Explanation:Fixation in biology refers to how tissues get preserved biologically so that they don't decay.

It prevents or get rid of biochemical reactions hence increasing the mechanical strength of those tissues.

Punctuated equilibrium (also called punctuated equilibria) is a theory in evolutionary biology that states that once the organisms has been fossilized or being out up there in the fossil record , it becomes table such that it will show no evolutionary changes

This is an example that can be explained by "THE PUNCTUATED EQUILIBRIUM MODEL OF EVOLUTION"

Explanation: Punctuated equilibrium model of evolution is a theory in biology that was proposed by the evolutionist which states that the population of a specie will be stable if only it appear in the fossil records. This theory explains that the changes in species occur very fast and rapid, which will last for a long period of time, before any changes can be made.

Because fixation due to random genetic drift is more rapid in blue eye person, this means that the specie of blue eye are not changing because their are fixed. A fixed gene, are those gene that always appear in an offspring and does not decay easily.

giant impact theory - the moon was formed from the collision between earth and another mars-sized body.

colliding planetesimals hypothesis - the moon was formed from the same cloud of material as earth.

capture hypothesis - the moon was locked into orbit by earths gravity as it was passing by it.

accretion hypothesis - the moon was formed from collisions and combining of planetesimals.

i think this is right, if not and you know better let me know.

d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer