Please write a summary of Chapter 18 of "Tangled Threads"

In a economy individuals answer the three basic and the central authority or leaders have little say in the economy.

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

The climate in the temperate zone is cold in summers and warm in winters very cold year-round very warm year-round warm in summers and cold in winters