Answer:
Su
Explanation:
"Mama" is within the 'él, ella, Ud.' box, making the possessive adjective su.
Cuando hace frio el se pone una chaqueta
The correct answer is: "Es preciso que uses sombrero"
In english (if needed): Pamela: "How can I protect my face from sunburn?" Roberto: "It's necessary to wear a hat."
Hoped I helped ^.^
I am pretty sure that the answer is a
