The answer is b because I just took my test and got it right so good luck
Answer:B
Explanation:
Red star had a lower temperature than yellow-white therefore it is cooler than yellow-white stars
Answer:
Population.
Explanation:
U.S., India, and China, are the areas of heavy emissions of carbondioxide gas due to areas of dense population. These three countries have about half of the world population i. e. approx. 3 billions of people so vehicles and industries are high in number which releases the greenhouse gases such as carbondioxide and carbonmonoxide while heavy emissions of carbondioxide gas occurs from Germany because there is huge number of industries are there so that's why it is called the industrial heart of Europe.