This question is a bit challenging, as arriving at the answer is not straightforward. The passage considers petitioning, as an expression of collective voice, to support procedural democracy (as mentioned in the second sentence of the paragraph). Option 1 is ruled out because it states 'political petitions give greater control to citizens to shape democratic agendas,' a point not discussed in the passage. Option 2 has the correct focus and wording, stating that petitioning supplements the electoral process by enabling ongoing engagement with the government. Therefore, 2 is the best choice. Option 3 is dismissed as it suggests relying more on petitioning instead of periodic elections, which is not supported by the passage. Option 4 expresses something contrary to what is given in the passage.