Answer:
B. it is a community of plants,animals and there physical surrounding.
 
        
             
        
        
        
Yes because without movement the tow truck will not be moved with 15,000 N
        
             
        
        
        
The formula will be AI2O3
        
             
        
        
        
Answer:
A .  2 O₃(g) + 2 NO   ⇒  2 O₂ (g) + 2 NO₂(g)
B . Yes
C.   O and NO₃
Explanation:
A. The overall reaction is obtained by adding the individual steps in the reaction mechanism where we will get the reactants and product and the intermediates will cancel.
Thus, adding 1+ 2 +3 we get
2 O₃(g) + 2 NO   ⇒  2 O₂ (g) + 2 NO₂(g)
B. The reaction intermediates are those that are produced from the initial and/or subsequent steps and are consumed later on in the reaction mechanism, but  are neither reactants nor products, they just participate.
From this definition it follows that O(g) and NO₃ are reaction intermediates.
C. O and NO₃