Do i need to think about changes to earth's rotational axis over time when i consider the causes of seasons?
a. no, because that cycle takes 41,000 years and it is not a factor in determining seasons.
b. yes, because changes to the axis create seasons.
c. yes, because the tilt of the earth's rotational axis changes with the seasons.
d. no, because the earth's rotational axis does not determine seasons.
no, because the earth's rotational axis does not determine seasons.

Option (D)

Explanation:

The seasons are the most important phenomenon that occurs on earth. It occurs due to the tilting of the earth's axis of rotation. This axis of rotation is tilted at an angle of 23.5 degrees, caused due to the collision with another proto-planets in its geological time. The axis of rotation is not related to the occurrence of seasons but only the tilting of this axis is responsible for the seasons. The earth when moves around the sun with its tilt, there forms 4 types of seasons on earth, namely the summer, autumn, winter, and spring respectively.

Hence, the correct answer is option (D).

81 is a composite number.

i'm sure the answer you are looking for would be

a. an ice age

hope this contact me if this didn't or you need with more answers : )