A dot density map uses dots to show the number of people living in a certain area.
ratio of land to water in a certain area.
types of resources in a certain area.
type of climate in a certain area.

ratio of land to water in a certain area.

Explanation:

A dot density map is also known as a dot distribution map. In this type of map, the symbol of the dot is used to denote certain features. Every dot is a representation of certain data highlighted in the map. In such maps, the area in which the dots appear in large numbers, the area is said to have a high density of certain features. There are specifically two types of dot-density maps. The first is one-to-one and the second is one-to-many. In a One-to-one dot map, a single dot symbolizes a certain feature. In a One-to-many dot map, a single dot symbolizes more than one feature.

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explanation:

agreeableness is a personality trait manifesting itself in individual behavioral characteristics that are perceived as kind, sympathetic, cooperative, warm, and considerate.

this is a pretty broad question and can be a pretty lengthy answer. since 1900, women have gained a lot more rights and have become active in the workforce. with women being in the workforce, men play a larger role in family life. many family tasks are shared between men and women, whereas, women used to be the sole family caretakers.

that should get you started at least.