because fossil fuels take forever to be created hope this helps
Answer:
Characteristics used to classify stars include color, temperature, size, composition, and brightness.
For the first question is that crabgrass because in the process of secondary succession a forest fire burns down a forest then grasses grow back, then annual flowers bloom and eventually trees begin to grow so crabgrass is the initial stages of secondary succession.
Answer: is D. Mercury was used to treat many illnesses long ago, and after being deemed safe by modern doctors its use has increased in the past 100 years.
Explanation: