Answer:
Individual differences
Explanation
In psychology, no two people are the same there will be some aspects of difference due to the principle of dissimilarity in nature.
The differences or variation can be the way they think, two individuals can not think exactly the same way.
It can be how they show emotions such as love, hate or pain. Also their personality and behavior.
These variations are influenced by many factors such as enviroment, gender, race or age of the individuals.
The respiratory system works to get essential materials to the cells when we breathe it takes the carbon dioxide from the alveoli ( air pockets in our lungs) and replacing it with oxygen. The circulatory system takes consists of veins which carries oxygenated blood from the entire body to the heart, and arteries which takes deoxygenated blood away from the heart to the lungs. Finally the digestive system works to get essential materials to the cells when we eat the vitamins, minerals and nutrients not only go to certain organs but also through the blood and the cycle starts all over again.
Vitamins allow ur body to grow and develop they also play as important roles in bodily functions such as metabolism immunity and digestion
The correct answer is A genes okay a part in determined shape and body weight.