Protecting their child or children against Bad minded people.2 they want to teach good habits which can be destroyed bad bad thingking minded groups
Sound travels in waves with higher frequencies together and lower frequencies spread apart.
Industrialism happens when an industry is introduced on a large scale to a region or country. An example could be that on the Industrial Revolution, where an economy goes from being based on agriculture to being based on manufacturing and other industries.
How quickly supply can be met, how much of the resource there is in existance, and how quickly the resource produces itself.