Final answer:
Constructing 100 houses near a lake can lead to significant ecological impacts, including landslides causing flooding, environmental phenomena such as lake turnover releasing carbon dioxide, and physical damage to land and structures around the lake.
Step-by-step explanation:
When 100 houses were constructed near a body of water, it can have significant impacts on the lake's ecology and the surrounding environment. Although the details of what exactly happened to the lake when these houses were constructed are not provided in your question, various scenarios from historical events suggest different outcomes. In one instance, the construction could lead to a landslide that displaces much of the water in a dam, potentially resulting in a catastrophic overflow and subsequent flooding downstream, as happened in 1963, leading to a tragic loss of life. Another possibility includes environmental phenomena such as a lake turnover, where gradual heating from below could cause warmer, less-dense water saturated with carbon dioxide to reach the surface, releasing large quantities of CO₂. This gas, being denser than air, could then flow down the valley, suffocating wildlife and humans. Lastly, the construction activity itself can have direct physical effects, such as destabilizing the ground and causing structures to be damaged or destroyed, which may in turn affect the lake's integrity. It's important to consider that uncontrolled development can lead to negative environmental impacts, and proper planning is necessary to minimize harm.