why the "which" below is in plural form?

"Personal fulfillment is achievement of life goals which are important to an individual, in contrast to the goals of society, family and other collective obligations. Personal fulfillment is an ongoing journey for a human individual."

I think it should be "which is important", because the "which" right now refer to the "achievement" and the achievement is in the singular form.

Please correct me if I am wrong

Link: https://en.wikipedia.org/wiki/Personal_fulfillment


Solution 1:

I just realised that the "which" is refer to the "life goals", not the "achievement".