What is the acronym that governs the use of estar and what do the letters each stand for?

What is the acronym that governs the use of awe and what do the letters each stand for?

Timoteo es de guinea ecuatorial. el

Ive been trying to figure this out for a week now , you basically explain how to get to each place (bottom right) starting from starting point , pls i need 1-10 by monday

Read and choose the sentence that matches the image. a man buying fish at a fish market and talking to the seller él compra el bistec. él compra los mariscos. yo pago los mariscos. yo pago el bistec.