Answer:
The sun
Explanation:
The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers, such as plants and algae, use energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter. This process begins the flow of energy through almost all food webs.
The correct answer for the question above is letter a. A farmer is trying to improve his crop yields by using a new kind of <span>fertilizer. It describes best the basic science research because it aims to make the the scientific theories better.</span>
Menstrual phase, begins at day 1 and lasts till approximately day 5. The uterus sheds its inner lining of soft tissue and blood vessels, which exits the body. Cramps are caused by the contraction of the uterine and the abdominal muscles to expel the menstrual fluid.
About 1 billion according to the photo
