Answer:
Using a control group means that any change in the dependent variable can be attributed to the independent variable.
Explanation:
Raw material extraction
manufacturing
distribution
and retail <span />
Answer:
there are many different cultures
there are different practices
different languages spoken in different countries
Cold air is correct answer
The release of greenhouse gases damages the ozone layer, (the layer protecting us from the suns rays) exposing the planet to the suns harmful radiation rays, increasing the temperature by a small amount each year
