Well, people started specializing in things and if they couldn't get something because they didn't know how to make it, they would trade for it. Fast forward 8000 years, companies like Coca Cola make coke and fanta and others can't make it because they're specialized for it. They trade for it with the entire world and other companies make things that Coca Cola owners buy.
        
             
        
        
        
If a student wants to study the effect of sunlight on plant growth. In his experiment, 12 plants receive normal amounts of sunlight, but half of them are kept under bright sun lamps all night long. The control group is: the amount of light the plant receives.
<h3>What is control group?</h3>
A control group is a type of experiment carried out  using two variables based on this control group   can be defined as the process in which experiment is carried on two different variables such as dependent variables and independent variables in which one of the variables is not experimented or tested.
Based on the given scenario if  after 6 weeks, the plants heights measured which inturn means that the  control group is the amount of light the plant receives.
Therefore if  12 plants receive normal amounts of sunlight, but half of them are kept under bright sun lamps all night long. The control group is: the amount of light the plant receives.
Learn more about control group here:brainly.com/question/24708013
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Answer:
It was justifiable, because it was a continuation of the process of spreading the country's territory.
Explanation:
- United States after 1783. had the idea of spreading towards the West, but additionally wanted to circle their territory towards the south.
- Florida was a Spanish territory with great importance, because it allowed them connection with the Caribbeans.
- Of course, this enabled economical prosperity and spreading of trade links.
 
        
             
        
        
        
I don’t know how many you needed