Final answer:
When legislative power reverts to the community, it means power returns to the people, and the state is left vulnerable. Typically, when no party wins a majority in a legislature, parties form a coalition. These scenarios reflect changes in political power distribution and capabilities.
Step-by-step explanation:
According to the text, when the legislative power reverts to the community, it signifies a return of the power to the people for their exercise, during which the state is vulnerable to dangers such as invasion and internal convulsions. This does not explicitly create a new form of government, make the community powerless, initiate a state of war, or require property redistribution. However, it implies a lapse in the structured government and potential for creating a new system or structure to regain stability.
Commonly, when no party wins a majority of seats in a legislature, the parties form a coalition to create a functioning government (option d). This is because the largest party may still not have the majority required to govern effectively, and new elections are not immediately called unless it's clear that a coalition cannot be formed. The legislature is not typically disbanded in these circumstances.