Which sentence contains a comma splice? (2 questions)

Read the excerpt from "lise marie de baissac.”in normandy, baissac pretended to be a refugee from paris living in the house of a schoolmaster. there, she to set up more resistance groups and organize sabotage actions. again traveling by bicycle, she maintained secret communications between groups and transported supplies. this was extremely dangerous work.which best describes the meaning of the underlined word? argued forblockedkept upunderstood

Whigh sentence represents a sequence of events where the understanding comes prior to completion of the homework

Dogs make wonderful pets because they keep us happy and healthy, the topic sentence is "dogs make wonderful pets". can someone me write a unrelated sentences to the topic and can be eliminated. need asap