The final cause (telos) is its purpose, the reason why a thing exists or is done, including both purposeful and instrumental actions and activities.
ðə fˈaɪnəl kˈɔːz tˈiːloʊz ɪz ɪts pˈɜːpəs, ðə ɹˈiːzən wˌaɪ ɐ θˈɪŋ ɛɡzˈɪsts ɔːɹ ɪz dˈʌn, ɪŋklˈuːdɪŋ bˈoʊθ pˈɜːpəsfəl ænd ˌɪnstɹəmˈɛntəl ˈækʃənz ænd æktˈɪvᵻɾiz.