Wanna zoom..anyone :')

Can someone answer this pls ill give brainliest both ser and estar mean ‘to be’. in what situations do we use estar? estar, venir, and ir are considered irregular verbs. what makes a verb “irregular”?

Cuando se movió el edificio en el terremoto muchas personas se

What groups of species are alive, eukaryotes, symmetrical, have backbones, and are tetrapods? (didn't mean to put spanish)