The second point in the paragraph about children provides more support for the overall topic: noise pollution. because it's offering more evidence that noise pollution is an issue, "furthermore" is your best choice as a transition. "for instance" would suggest that you're giving an example of something, as in a specific case in which a child's education suffered. "however" suggests a shift, usually describing an exception, and the point of the children's education is not an exception--it's further evidence. "consequently" suggests that you'd carry on to tell the reader about an effect of a circumstance.
Having a dog as a companion is well worth the trouble and expense.
The cerebellum is part of the hindbrain in vertebrates. It lies between the brainstem and cerebrum in humans and helps regulate motor movements, helps us perceive senses and coordinates voluntary movements like posture and balance.
