Answer:
Negative reinforcement 
Explanation:
Negative reinforcement can be defined as the acts or behaviour carried out by person in order to encourage someone to do what he /she said. 
Negative reinforcement are often use to encourage or motivate someone and as well change the person behaviour. It also strengthened a person behaviour by removing negative result.
This example "Elton's mother has been nagging that he should practice at the piano for the upcoming competition. Elton eventually complies to stop her nagging" simply illustrates NEGATIVE REINFORCEMENT because Elton's mother was nagging in order to encourage Elton's to practice the piano for the upcoming competition and as well change is behaviour in which Elton finally complies to do what she said due to her nagging.
 
        
             
        
        
        
Answer:
A highway is a main road, especially one that connects towns or cities.
famous highways are Pan American Highway,Great River Road. 
Blue Ridge Parkway. etc
 
        
             
        
        
        
Answer:
<em>problem-focused coping</em>
Explanation:
Problem-focused coping can be referred as the things we try to do in order to cope up or tackle a problem. Problem-focused coping is the usage of practical ways to overcome a stressful or problematic situation. As a result, stress is reduced. 
In the scenario mentioned in the question, Albert is using a practical way to reduce his stress by making a step-by-step 'to-do' list. This is an example of problem-focused coping. 
 
        
             
        
        
        
Nicolaus Copernicus and Galileo Galilei
        
             
        
        
        
Answer
slash and burn farming removed unwanted wildlife from an area