The answer is a delusion.
Robert is exhibiting delusion due to his depressive disorder. A delusion is a kind or characteristically a symptom of mental disorder which made a person having a distinctive belief or impression that is positively maintained despite being opposed by what is generally accepted as reality or logical argument just like what Robert portrays.
The answer to your question Is letter B.Defended. Hope I helped.
One object is a block of wood
The best example out of these of a secondary source is the (C) an academic analysis of key battlefield strategies. Secondary sources are sources that analyze or interpret primary sources or mediums that describe, depict, or show a first hand account of an event.
While the region was widely occupied by humans as early as 12,000 B.C.E., historians believe that large civilizations began in Mesopotamia between 4,000 and 3,000 B.C.E. Mesopotamia's development in this period was supported by a series of geographical factors, including rivers and fertile lands.