I’d say the first option. “The disposal of radioactive wastes is an intended benefit.”
I’m sorry it it isn’t correct.
        
             
        
        
        
Answer:
Distinction of crude density and ecological density necessary and which one of these densities are greater is explained below in details.
Explanation:
Density measure in courses of the amount of territory possible as existence reservation is ecological density. Crude density incorporates all the property within the animal's reach whereas ecological density incorporates only that division of property that can actually be established by the species.
 
        
             
        
        
        
Theory because a theory has to be backed up by several experiments
        
                    
             
        
        
        
The provided question is incomplete, the correct and complete question is as follows:
Choose the answer that best completes the sentence below.
Scientists group materials together ____________ it is easier to compare and study them that way.
A however
B but
C although
D because 
Answer:
The correct answer is - option D because.
Explanation:
Researcher and scientists tries to group material together on their similarities and difference to one another which makes it easier to study and compare various type of materials.
It is the one of major reasons to differentiate materials between groups like liquids state, gases state,  plasma state and solid state materials. One can easily see the difference and comparison is very clear on this type of grouping of materials.
Thus, the correct answer is - option D.
 
        
             
        
        
        
Answer:
<em>The correct option is C) OH</em>
Explanation:
In the field of chemistry, radicals can be described as atoms, molecules or ions which have at least one unpaired electron.
The formation of a radical occurs when a single covalent bond breaks so that each of the atoms that had been involved in the formation of the covalent bond can have an unpaired electron. Examples of radicals include OH, NH4+ etc.
Other option, like option B, is not true because a molecule of water does not have any unpaired electrons in its valence shell.