I'm not 100% sure, but I'd say the availability of vaccines and medicine.
Development of breast tissue
The warm air will rise because cold air is heavier than warm air.
Answer:
1
Explanation:
"Six carbon dioxide molecules (CO2) are required to create one glucose molecule (C6H12O6) because carbon dioxide has one carbon per molecule, while glucose molecules have six carbons."
An example of a parallel choice on a dichotomous key is happy or sad and old or young. Either one of those answers.
