In what ranges have differences from normal variation been observed on Lake Ontario?

The correct choice highlights the specific longitudinal range in which significant differences from normal variation have been observed on Lake Ontario. This range, 006 W to 007 E, is important because it indicates areas where changes in environmental conditions, water levels, or other ecological factors have been documented. This could relate to shifts in climate, human activity, or natural events that affect the Lake Ontario ecosystem.

Focusing on this particular range is critical for understanding regional variations in the lake's behavior, which can inform water management policies, environmental conservation efforts, and recreational planning. For example, monitoring these differences can help in recognizing trends in fish populations, water quality, and habitat health, thus guiding decisions and interventions to safeguard the lake's ecological integrity.

Other ranges may not reflect the same level of observed variation, potentially due to lower incidence of significant changes or the absence of rigorous data collection in those specific areas. Thus, the choice emphasizing the 006 W to 007 E range is supported by the importance of data in understanding and managing the lake's environmental conditions.