Which of the graphs below best represents the relationship between the levels of carbon dioxide and the average extent of glaciation over the last half million years of Earth's history? 
Definitions:
Attitude
A psychological construct representing an individual's degree of like or dislike for an item.
Age
The length of time that a person or object has existed, often used as a measure in years.
Gender
A social construct that refers to the roles, behaviors, activities, expectations, and societal norms associated with being male, female, or other gender identities.
Occupation
A person's job or profession, typically one that requires specialized training or education.
Q1: A group of individuals born at the
Q49: Species extinctions matter to human society because<br>A)
Q62: Which of the following cellular responses to
Q68: If the net primary productivity of a
Q98: Introduced species that spread widely and become
Q107: How will global climates and ecosystems change
Q111: If birth rates exceed death rates and
Q123: In the graph, the population size at
Q125: In which biome is most of Massachusetts
Q126: Protein movement within a membrane may be