B.
When fossil fuels are burned carbon dioxide is released in to the atmosphere
hope this helps
Scientists cannot provide accurate information on environmental conditions
Cells divide for many reasons. For example, when you skin your knee, cells divide to replace old, dead, or damaged cells. ... When organisms grow, it isn't because cells are getting larger. Organisms grow because cells are dividing to produce more and more cells.
The correct answer is (a.) a mutation of the hemoglobin allowing better oxygen-carrying capacity. The mutation of the hemoglobin that allows a better oxygen-carrying capacity would be the most beneficial to an elephant and its descendants.
No estoy seguro que decir, pero sí es difícil
