Final answer:
The adaptation that is not related to water conservation is allowing a larger indoor temperature range as it gets colder/warmer outside.
Step-by-step explanation:
Among the options listed, the adaptation that is not related to water conservation is allowing a larger indoor temperature range as it gets colder/warmer outside. This adaptation is related to managing indoor climate conditions, rather than conserving water. The other options mentioned, such as eating less meat and conserving water via shower habits, are effective ways to conserve water.