The composition of a star is abundant in hydrogen and helium, both of which are two of the lightest elements. Because they are very light, they are usually unstable. To becomes stable, hydrogen atoms spontaneously combine with each other through a radiation process called nuclear fusion, to yield helium atoms. This process requires very high energy in the form of heat. Therefore, these lighter elements are burned in order to keep the star alive with energy.
Therefore, the answer is D.
The reporting of the results of any new research or findings is a necessary step. The reporting of the new discovered drug for the treatment of cancer needs to be reported in a peer-reviewed journal as well. The peer-review helps in validating the authenticity of the results of a research. Publishing the findings in a peer-reviewed journal will allow other scientists to check the findings and ensure the reliability.
Answer:
im not sure but i think its A
Explanation:
