Answer:
B. by chatting with friends
C. by downloading violent or sexual content
Explanation: The immoderate use of internet can decrease Ryan's concentration for studying and lead him to explore deeper into the internet world. By having access to almost everything online, he can delve into online sexual content and develop interest in it. Since the content varies, it is most likely for Ryan to get attracted to violent content. Also, as a teenager, instead of using internet to gather information for a lecture or a test, he can quickly lose interest by being online with his friends constantly. Therefore, it is very important for parents to have some kind of control of the teenager's online surfing since it can deeply affect his concentration, mental health and view of sexual intercourse.
The relationship between the human foragers and the environment was much different than the one of the modern times. The foragers where directly dependent on the environment for their survival. They were not producing anything, so they were using the environment to get food and all the resources they needed. Nowadays, the relationship between the humans and the environment is much different, as most of the humans are directly dependent on the environment for the survival. This has led to have much less appreciation of it and very often even destroying it. The humans' relationship with the environment nowadays is much more recreational, scientific, or to use it for their further development.
ABC charges 1.30 for 1 can but xyz charges 15.50 for 12 cans take 15.50 divided by 12 and the answer is 1.29 so xyz is the better buy