関武夫さんという自然を愛している方が生前持っていた森を、ご遺族の方が（財）埼玉県生態系保護協会に寄付したんですね。 Intuitively, the natural amount n is the prevalent residence of all sets which have n things. So, It appears natural to determine n as an equivalence course under the relation "is usually designed in one to 1 correspondence". 関さんの森、という言葉の響きが少し面白く感じて... https://naturalhealthproducts.sport.blog/2025/09/03/ayurvedic-lifestyle-care-solutions-buy-from-cureayu-online/