The answer to this question is iris
30 to 40 percent of a healthy person's body mass is made up of skeletal muscle.
The ability of carbon to form long chains is called Catenation.
Answer:
Environmental engineer
Explanation:
Environmental engineers design strategies and solutions to deal issues using the concepts of architecture, biochemical engineering, physics and chemistry. They are working to promote recycling, waste management, environmental health and management of environmental degradation.
