Answer:
The Spanish direct object pronouns are: me, te, lo, la in the singular, and nos, os, los, las in the plural. The object pronoun usually comes before the verb. Object pronouns are joined to the end of infinitives, gerunds or verbs instructing someone to do something.
Explanation:
Its 1 and 3 (hrhfjddjdjdjjdjfjfjfjfjfjfjfjfjffj) (i typed the spam cuz of the 20 character long thing lol)
el león es un mamífero ^-^
1. les dice (the seller would tell, not ask, the price; clientes is plural so you use les)
2. le escribe (you're writing to your mother in order to know if she wants a new purse)
3. te dan (it means do your friends give you many gifts on your birthday)
4. le vende (she's selling it to Cristina; she's only selling one)
5. le describen (they're describing the new mall; mall is the direct object so it's singular)
6.le paga (you pay with a credit card, not lend, and it's 'le' because it's usted)
hope I helped!