Which of the following is a key feature of happiness? joy

contentment

feeling like life is meaningful

All of the above options are features of happiness

All of the above options are features of happiness.

I hope this helps

feral cats are estimated to eat tens of millions of native animals each night in australia

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]