Pls help this is due tonight and I need help

Berikan satu kepentingan terhadap komposisi udara di atmosfera bumi

The ancestors of horses possessed feet with five digits. over time, with the development of grasslands, the digits fused and formed hooves. what evolutionary advantage did this transformation serve? a. it allowed them to climb rocky surfaces with ease. b. it allowed them to graze better. c. it enabled them to run faster from predators. d. it let them see clearly through the grasslands. e. it made them taller.

Which is a factor that might lead a person to make a career choice for the wrong reasons?