The Deccan Riots Commission was established to address certain issues in the Deccan region. Option 1 states that the commission was concerned with the indebtedness of the peasants. This means that the commission aimed to investigate and find solutions for the problem of peasants being burdened with high levels of debt.

Option 2 suggests that the commission was concerned with the lack of law and order in the Deccan. This implies that the commission focused on the issue of crime and disorder in the region.

Option 3 states that the commission dealt with problems related to the Ryotwari system. The Ryotwari system was a British land revenue system in India, so if this option is correct, it means that the commission was primarily concerned with issues arising from this system.

Option 4 suggests that the commission focused on communal riots in the Deccan region. If this option is correct, it means that the commission was primarily concerned with addressing conflicts between different religious or ethnic groups.

Based on the given options, option 1 is the correct answer. However, it is important to note that there may be overlapping issues that the commission may have addressed in addition to the indebtedness of the peasants.