Answer:
A. To keep invaders out of China's walls
Explanation:
She firmly established Protestant practices but retained catholic rituals and ceremonies ; thus bringing about Protestantism gradually and without opposition.
Canning was unsustainable because the process back then was labor intensive; the process was still undefined, and the materials are very primitive. The cans used were corked and sealed with lead which led it to be hazardous
Wind patterns, ocean currents, proximity to large bodies of water (i.e. seas and oceans), and elevation all impact climate patterns through a variety of factors. These factors largely impact the flow of energy and heat from the sun across the Earth's surface through processes of convection. For example the "Jet Stream" in the United States is a wind pattern that carries air and weather patterns across the United States and its flow shifts directions depending on seasons. Another is the Gulf Stream which brings warm currents from the Caribbean and Central American up the American coast and out into the Atlantic ocean warming the temperatures of the coastal water ways and also impacting the climate of the land near it.
The correct answer is the Underground Road!
The Underground Road was a network of safe houses and secret routes in 19th century that the slaves could use to escape to the north or to Canada. People helping the slaves were both black and white and both free and slaves were helping too!