Answer:
D. A nucleus
Carbon contains four electrons in its outer shell. Therefore, it can form four covalent bonds with other atoms or molecules. The simplest organic carbon molecule is methane (CH4), in which four hydrogen atoms bind to a carbon atom
Answer:
History of exercise and health.
Explanation:
The exercise is important for all the individual as it keeps the individual fit and healthy. The different exercise are performed by the different individuals based on their age, sex and strength.
The research related to the physical health and physical activity was started in 1980's. These researches explains the importance of the exercise and the positive relationship between the health and the exercise. The health benefits of the yogas and asanas are started during this time.
Thus, the answer is history of exercise and health.
Answer:
Imported marmalade was expensive.
Explanation:
The last one is right answer i think
B. skeletal and nervous system
