Indigenous
Imagine how challenging it is to move to a new city and adapt to its unique culture, climate, and pace of life. This situation is similar to how an introduced species might struggle in a new ecosystem, whereas a native species has evolved perfectly to fit its environment over time, much like someone who has lived in the city their entire life and knows its ins and outs. Just as a long-time resident is familiar with the best routes to avoid traffic or the local slang, a native species has evolved specific traits that suit its local ecosystem, resulting in a perfect fit shaped by natural evolution.
Practice Version
Indigenous: A native species in an ecosystem evolved as the result of only local natural evolution. Indigenous. Indigenous means a plant or animal that originates and grows naturally in a specific area or region without human intervention.