You can find out that they have the ability of giving the trait of freckles even if they do not have them themselves these people are called carriers
Answer:
A.Carbon Monoxide
Explanation:
Carbon Monoxide is a, colorless, odorless, poisonous gas produced when tobacco burns
Tendons of muscles attach to bones.
Answer:
Exercise of any kind.
Explanation:
Doing normal daily activities like lifting groceries or walking up and down stairs can build muscle endurance, other endurance activities include swimming, running, cycling and other similar activities that involve a repeated motion over a longer period of time, However you don't necessarily have to exercise to do so.