This is what language would look like without pronouns:
My sister has two kids. My sister lives in Mexico. My parents talked to my sister yesterday, my sister said my sister was coming to visit.
My sister has two kids. She lives in Mexico. My parents talked to her yesterday, she said she was coming to visit.
In level 1.0, we learned that inanimate objects have a gender in Spanish. They are either feminine or masculine and so are the pronouns.
I like this T-shirt, should I buy it? → Me gusta esta sudadera, ¿la compro?
I like this coat, should I buy it? → Me gusta este abrigo, ¿lo compro?
|Article||||Pronoun (direct object)|
|Compro la sudadera.||→||La compro.|
|Compro el abrigo.||→||Lo compro.|
|Compro las camisas.||→||Las compro.|
|Compro los zapatos.||→||Los compro.|