Marta is the subject of the sentence because she is performing the verb "Planned"
As you read the passage, which of these answers makes sense when it comes to Elmer? Looking through it, I see that Elmer was a child at the time of the story and was on an adventure. So, to say he was lazy does not make sense. Since he was a child looking for a dragon, it is unlikely that bravery was a part of this scenario. That leaves foolish or lost. He as stood there for awhile watching the lion, so I would say that foolish is the best answer.
