Answer:
Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others. ... Through this process of natural selection, favorable traits are transmitted through generations.
 
        
             
        
        
        
Answer:
Oxytocin is the correct answer.
Explanation:
- Oxytocin is a hormone that is released by the pituitary gland and it helps to stimulate the contraction during the labor and it reduces and controls the uterine bleeding.
- Oxytocin is also called a love hormone as it is responsible for human responses associated with bonding and relation.
- Breastfeeding excites the release of the oxytocin from the brain and it provides the baby to get the breast milk from breasts.
 
        
             
        
        
        
The correct answer is somatic symptom disorder.
This refers to a disorder when you feel discomfort or pain, however, there is no explanation for it given that the scans show no problems with your body. It may seem that it is all in your head because you will keep going to doctor trying to find a cure for something that ultimately doesn't exist.
        
             
        
        
        
1. compound 
2. element 
3. element
4. compound
elements are only one type of thing, compounds are more than one type of thing