Answer:
The correct option is A. matching pairs of participants based on a variable and then randomly assigning one member of each pair to each group.
Explanation:
A matched pairs design involves matching pairs of participants based on a variable and then randomly assigning one member of each pair to each group.
Levees are built up land to prevent water from flowing into cities when the sea levels are either higher than usual or the city is below sea level.
They used the Nile river for crop irrigation and ship transportation
Answer:
erosion
Explanation:
erosion changes the form of a rock
Answer:
Suffrage
Explanation:
Suffrage, political franchise, or simply franchise is the right to vote in public, political elections (although the term is sometimes used for any right to vote).