Ésta es la familia rosario. la mamá es muy simpática. el papá trabaja mucho. nancy limpia la casa y pablo ayuda a su mamá. todos ellos son muy felices. what does dad do? he cleans the house. he works a lot. he does the shopping. he mom.

Works a lot.

Explanation: We need to see what the dad of the Rosario family does, and the information that we have is the text prior to the question:

A rough translation of the text is:

"This is the Rosario Family. The mom is very nice. The dad works a lot. Nancy cleans the house, and Pablo helps his mom. They all are happy"

So the right answer is the second one; The Dad works a lot.

when the outside temperature is too cold, an endothermic animal can generate heat by shivering. endothermic animals must eat much more often than ectothermic animals since it takes energy to maintain a constant body temperature.