The supreme court extends its powers by their decisions which sets a precedents knows as case law. This law is followed when lower courts make decisions. It decides if the laws congress is making are constitutional or if they can be overturned.
Township and Range
The township and range system began its usage after the passage of the Northwest Ordinance in the Articles of Confederation. The geographical system divides land into townships with 36 1-square mile plots within each township. The townships are measured against a east-west and north-south range lines. This system created square divisions of land compared to the metes and bound system that used landmarks to create boarders.
'Within living memory' - ie a witness to the event, grandparent, etc
'Written / photographic account' - ie the event has been recorded either on paper or on film
'Other evidence' - eg archeological dig and interpretation of the results.
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Answer: elastic clause
Explanation: The quote mentioned “possible changes of things” meaning that they’re laws that can change depending on the situation hence the term elastic.