What are the 3 elements of health

During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4

Felicia has a respiratory infection and has been coughing up a lot of mucus. she knows this means that her respiratory system is working to restore balance by getting rid of the invasive materials from her lungs. how does this happen?

Describe factors that can make dishes in restaurants have nutritional values