<span>The heart contains four chambers: upper left atria, upper right atria, lower left ventricle and the lower right ventricle. Oftentimes, the right atria and right ventricle are together referred to as the "right heart" and the left atria and left ventricle are referred to as the "left heart", however there are still four separate chambers.</span>
This is obvious but the correct answer is B. Earth
HOPE I HELPED
Answer:
Photoautotrophs use light energy to convert carbon
dioxide into organic compounds. This process is called
photosynthesis .
I think the answer is photosynthesis 2