I believe Costa Rica has no deserts. Almost all of the interior of Costa Rica is mountains that are blanketed in jungle/forest. Also it has around 7 active volcanoes depending on how you'd define an active volcano, one of the more popular ones is the Poas Volcano which i believe is a national park. As for beaches, Costa Rica is surrounded completely on 2 sides by the Pacific on the West and the Gulf of Mexico on the East.
The answer would be D. Sirvo
It should be hablé since if it talking about someone else. If it were to be you, however, the sentence would be “Yo hablo con Juan.” Comprende?
I don't understands neither, first you say that you are not okay and then you say that you are excited.