Dog breeding has breeders choosing the best dogs to use for breeding, so they are artificially creating an environment for breeding to occur. This is opposed to letting them breed naturally, which may produce unfavorable results.
Answer:
The estimates I've read are similar to yours: 200 to 400 billion stars. Counting the stars in the galaxy is inherently difficult because, well, we can't see all of them.
Explanation:
A line chart or line graph is a type of chart which displays information as a series of data points called 'markers' connected by straight line segments. Some of the best uses involve measurements where a scatter-chart is not enough and other types of charts/graphs fail in other ways.
Answer:
The greenhouse effect:
The process in which gases in the atmosphere trap heat from the sun and warm the Earth. is the natural warming of the Earth’s atmosphere Solar radiation enters the atmosphere mainly as light and some of that radiation is absorbed by the Earth’s surface then changed to heat that is reradiated into the atmosphere where it is absorbed by greenhouse gases then reradiated back to Earth again