Él is for masculine , ella for feminine and ello ('it' in english) it's a personal pronoun with neutral gender referring to other parts of a sentence, not people (without gender). Can be changed by 'eso' (that) Here's an example: -Tenía que revisar los tanques de oxígeno, ¡La vida de él dependía de ello! (ello - pronoun : revisar los tanques de oxígeno) -Me siento mal , por ello voy a cambiar de trabajo (ello - pronoun: me siento mal) 'Lo/Los , La/Las' refer to the direct object of a sentence not the subject : - Quiero un perro -> Lo quiero (Lo = un perro, masculine singular, direct object) -Dame tu carpeta -> Dámela (La = la carpeta, feminine singular , direct object), in some cases it goes at the end of the verb. -Quiero los perros > Los quiero (Los = los perros, masculine plural, direct object) -Compro unas botellas -> Las compro (Las = las botellas, feminine plural, direct object) ---------------------------------------------------------- Singular---- Plural 1.ª persona(yo, nosotros/as)--------------- me--------- nos 2.ª persona(tú, vosotros/as)------------------ te---------- os 3.ª persona( él/ella/ello , ellos/ellas) -- lo, la-------los, las Hope this helps you understand , tell me if you don't understand something.

Oh sorry, I didn't think about providing an example, next time I see it I'll update this question!

Ella/ Ello is the noun and La/Lo is the article. It would be better if you write the sentence where you see it, at first glance I don't really understand your point, you know so I can give you a better explanation