Answer:
The air at higher altitudes is colder, less dense, and contains fewer oxygen molecules. This means that you need to take more breaths in order to get the same amount of oxygen as you would at lower altitudes. The higher the elevation, the more difficult breathing becomes
Explanation:
The head lamp has a balanced force.
The book has a balanced force.
The car has a balanced force.
The clock doesn't have a balanced force.
The ball has a balanced force.
The bicycle doesn't have a balanced force.
The air jet has a balanced force.
The boat doesn't have a balanced force.
The teddy bear doesn't have a balanced force.
Answer is e hope this helps
I think it's D. Adalya and Declan