One of the main reasons why life expectancy dramatically rose in the past century was due to different factors. One that surely contributed to them was better access to medical equipment and medical advances themselves. As well as better nutrition that was available to the common person. 
        
                    
             
        
        
        
I had this question on my quiz once im pretty sure its false , hope this helps
        
                    
             
        
        
        
<span>The correct answer is A. In the afternoon. It's not right after a meal and it's not like you just woke up and are not fully awake. It's also good because it's not the hottest part of the day so you won't overheat and suffer a heatstroke. Afternoon is therefore the perfect period for working out.</span>
        
             
        
        
        
Answer:
Explanation:
If they get hurt or if anything happens while they are in practice they have a plan to fall back on and that way they also dont have to sue or pres charges wright away.
 
        
             
        
        
        
Answer:
Environment
Explanation:
In a research study, internal validity refers to how well an experiment was carried out and to what extent the piece of evidence supports a claim.
The lesser the chance of confounding in a study the higher the internal validity.
Study of memory is possible through learning the electrical activity created by neurons.
Therefore, thunderstorm will affect the readings hence it is an Environmental threat to the internal validity.