An absorption line will appear in a spectrum if an absorbing material is placed between a source and the observer.
        
             
        
        
        
Answer;
Oxygen or an oxidizing agent to receive electrons must be present for oxidation to occur in chemical reactions.
Explanation;
Oxidation entails the loss of electrons from these molecules, causing them to become unstable and highly reactive and leading to their eventual reaction with and damage of cell components such as membranes.
-In redox reaction; The ion or molecule that accepts electrons is called the oxidizing agent; by accepting electrons it causes the oxidation of another species. Conversely, the species that donates electrons is called the reducing agent; when the reaction occurs, it reduces the other species.
 
        
                    
             
        
        
        
Answer:
A: Ignitable
Explanation:
Remember, ignite means ability to basically catch fire. Since varnish is flammable (can catch fire), it must go in ignitable waste
 
        
             
        
        
        
Answer:
heat
rainfall
Explanation:
heat and rainfall determine which traits are adaptive