In the case of animals, this agency is a combination of how it develops from the egg, and how its body functions.
ɪnðə kˈeɪs ʌv ˈænɪməlz, ðɪs ˈeɪdʒənsi ɪz ɐ kˌɑːmbᵻnˈeɪʃən ʌv hˌaʊ ɪt dɪvˈɛləps fɹʌmðɪ ˈɛɡ, ænd hˌaʊ ɪts bˈɑːdi fˈʌŋkʃənz.