Which of the following is a known cause of Parkinson's disease?

The accurate understanding of the causes of Parkinson's disease highlights the role of genetic inheritance as a recognized factor contributing to its development. Research indicates that certain genetic mutations can increase the risk of developing Parkinson's, particularly in individuals with a family history of the condition. These genetic factors are significant in some cases, showing that inherited traits can play a key role in the onset of the disease.

While environmental toxins and viral infections have been studied in relation to Parkinson's disease, the scientific community currently sees genetic inheritance as a more established cause. Environmental factors, such as exposure to specific chemicals, have been identified as potential contributors to the risk of developing the condition; however, these links are more complex and not as direct as those established for genetic factors. On the other hand, while there may be associations with viral infections, they are not regarded as a primary cause of the disease. Thus, emphasizing genetic inheritance is crucial when assessing the multifactorial origins of Parkinson's disease.