Heat waves and shifting patterns of mosquitoes and other vectors are closely linked to changes in temperature and rainfall patterns. These are direct manifestations of climate change. The stem connects heat stress and vector borne diseases to a type of change,which clearly is climate change. Therefore Option C is the correct choice.
Option A:
Industrial change may alter employment and pollution but does not by itself explain systematic shifts in temperature and disease vectors. It is not the most accurate term here.
Option B:
Demographic change refers to shifts in population size, age and distribution. While these affect vulnerability,they are not the main driver named in scientific assessments for heat stress trends.
Option C:
Climate change alters temperature,precipitation and extreme weather patterns,creating conditions favourable for some vectors and harmful to health. This is exactly the link mentioned in the question.
Option D:
Technological change can influence health through new tools and risks,but it is not the primary cause of the specific trends in heat stress and vector distribution described in the stem.
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