Answer: The river source, river mouth, downstream, upstream, flood plain, main-river, meander, tributary, watershed boundary, and wetlands.
Explanation:
 
        
             
        
        
        
Causes the sun's radiation to strike the hemisphere at different angles which causes increase in temperature. 
 
        
             
        
        
        
Answer: A  mutation Changes by its mistake in the DNA which results in the wrong amino acid being incorporated into a protein because of change, that single DNA sequence change, results in a different amino acid codon which the ribosome recognizes.
Explanation:
A mutation changes the instructions of a gene, which can also change the protein. Sometimes this change makes it so the protein can't do its job as well. And this is what happens with sickle cell anemia. A mutation in the hemoglobin gene changes the hemoglobin protein in a way that causes sickle cell anemia.
 
        
             
        
        
        
Answer:
Mutations are naturally caused by errors in DNA replication, by physical or chemical methods. The mutations change the genetic makeup of the organism and introduce new alleles or combination of alleles in a population. These random mutations accumulate over time and increase the genetic variation among the population.
Explanation:
 
        
             
        
        
        
Answer:
Social psychology is a correct answer.
Explanation:
The branch of psychology that studies how a person's thoughts, feelings, and behavior are influenced by the presence of other people and by the social and physical environment is called '' Social psychology."
Social psychology studies about people's feelings, behaviors and thoughts are influenced by the involvement of other people.
It explains the cause of how the feelings, beliefs, thoughts, goals, and intentions are influenced by others.
Thus Social psychology is the branch of psychology which deal with the studies human interaction in the social groups and explain the social situation's impact on human behavior.