Brazil's former capital, Rio de Janerio was a coastal city and on April 21, 1960, the project to build a more central capital began, this new capital is Brasilia.
Almaty was replaced by Akmola a more central city as the capital of Kazakhstan. Myanmar, Pakistan and Tanzania also changed their capitals in favor of a more central location.
I believe the correct answer is A. Photosynthetic organisms, because they remove certain amounts of CO2 in the atmosphere to carry out the process of photosynthesis. Unlike the other options that increase CO2.