Tone is 'the attitude that is conveyed by the narrator of a story'. A reader can be persuaded by a writer's use of tone particularly if it matches the readers own 'feelings' on the subject.
For example in Mein Kampf Hitler used a very superior tone - which matched the sentiments of the general population of Germany at the time.
1.) Wise/experience - They have been alive for a long time, they have learned so much, and gone through so much. Deaths, new beginnings, bad and good things and define their life.
2.) Determined - Obviously they are determined to live. It's pretty rare to live that long and be very healthy for more years to come.
Here are some things that they probably did to stay as old as they are.
Positive attitude, exercising, living independently, eating good food, and etc...
Hope I helped.
Evidence and details from the text
In the photo above they’re are 3 cute kittens all crowded together wanting to get attention or adopted .They’re tired of living the way they do and hope to find a new loving family