What was one effect of the 1666 London fire?

The correct answer is the adoption of the London Building Act, which was a significant response to the Great Fire of London in 1666. This devastating fire destroyed a large portion of the city, exposing the inadequacies in existing building regulations and the need for improved fire safety measures.

In the aftermath, officials recognized that the city's design and construction practices contributed to the fire's severity and spread. The London Building Act was introduced to regulate building materials and methods, ensuring that future structures were constructed in a way that minimized the risk of such a disaster occurring again. This act included provisions for the use of fire-resistant materials, restrictions on the height and proximity of buildings, and overall safety measures that directly addressed the vulnerabilities that the fire had revealed.

The other options, while they reflect various impacts that could arise from such an event, do not have the same direct historical correlation with the aftermath of the fire as the London Building Act does. The act represented a transformative shift in urban planning and building regulation, aiming to create a safer environment for the residents of London and establish standards that we still reference in building codes today.