i believe you should put a comma instead of a period after over
A: How many books did you read over the weekend, Emma?
Answer: Controlled burning allows the Forest Service to control the effects of fire, its location and intensity. This poses a Positive effect. To be honest, there is nothing that poses a threat to controlled fires, unless it gets too big and gets uncontrollable, which rarely happens.
Affect is usually a verb, and it means to impact or change. Effect is usually a noun, an effect is the result of a change.
No one is gonna write a paper for you