The first would be the structures. Both substances makes the ceramic had a very solid structure which make the end product much less likely to be broken apart.
Not only that, using those substances will allso make the ceramic  more durable toward sheat and much more resistance to corosion if compared to the traditional ceramic.
        
             
        
        
        
Based on the fact that Ravi has to brush a certain amount of times, he most likely suffers from obsessive-compulsive disorder.
<h3>What does obsessive-compulsive disorder lead to?</h3>
When a person has OCD, they will engage in repetitive actions because they believe that not doing so can lead to further problems.
Ravi therefore engages in the repetitive action of brushing a certain number of times, because if he doesn't do so, something bad might happen. 
Find out more on obsessive-compulsive disorder at brainly.com/question/7578271.
#SPJ
 
        
             
        
        
        
Answer:
A. Padding estimates
Explanation:
According to my research on the answers provided for this question, I can say that based on the information provided within the question the factor being illustrated in this situation is Padding Estimates. This term refers to making the budget or estimate larger that what it is supposed to be in order to allow for last minute expenses or surprises.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
 
        
             
        
        
        
Post traumatic stress disorder
it is diagnosable after months of having more than one symptoms of PTSD, including flashbacks, nightmares, etc. if she had it short-term and it went away, it would be acute stress disorder. since it is years after the event, it is PTSD