can you tell me what is the fourth disease refers to?
It is a developmental disorder characterized by difficulties with social interaction and communication, and by restricted and repetitive behavior.
Autism
Autism is a developmental disorder characterized by difficulties with social interaction and communication, and by restricted and repetitive behavior. 
which of these processes takes place in the mitochondria of a cell They supply cellular energy, and control the cell cycle and cell growth. who discovered this part of the cell? Richard Altmann who was he? He was a German pathologist and histologist. can you tell me about the structure of the above cell part? It contains outer and inner membranes composed of phospholipid bilayers and proteins. which disease is caused in it? Mitochondrial disorders, cardiac dysfunction, heart failure and autism are some of them. how is it related to culture? UNANSWERABLE does it produce any kind of heat? The "proton leak" process results in the unharnessed potential energy of the proton electrochemical gradient that is released as heat.
wiki:1545095
Autism [SEP] Introduction
Autism is a developmental disorder characterized by difficulties with social interaction and communication, and by restricted and repetitive behavior. Parents often notice signs during the first three years of their child's life. These signs often develop gradually, though some children with autism experience worsening in their communication and social skills after reaching developmental milestones at a normal pace. Autism is associated with a combination of genetic and environmental factors. Risk factors during pregnancy include certain infections, such as rubella, toxins including valproic acid, alcohol, cocaine, pesticides, lead, and air pollution, fetal growth restriction, and autoimmune diseases. Controversies surround other proposed environmental causes; for example, the vaccine hypothesis, which has been disproven.