What Do the Following Sentences Refer to

question 1

Short Answer

What do the following sentences refer to :
-On average, peak running speed occurs in girls at about this age (years).

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Definitions:

Canada

A country located in the northern part of North America, known for its vast landscapes, multicultural cities, and as a member of the Commonwealth of Nations.

Demographic Transition

The shift from high birth and death rates to low birth and death rates as a country develops from a pre-industrial to an industrialized economic system.

Population Growth

The increase in the number of individuals in a population, often measured through rates of birth and immigration.

GDP PPP

Gross Domestic Product (GDP) measured in terms of the Purchasing Power Parity (PPP), which adjusts for price level differences across countries, providing a more accurate comparison of economic productivity and standards of living.