The composer of the "prelude to tristan and isolde" is?

Spencer's blog claims that national parks are the best vacation destinations. which evidence is best for developing his claim? a personal account from a park visitor who describes positive adventures at grand canyon and yellowstone parks an interview with a travel agent who advertises cruises, eco-tours, and whitewater rafting trips a chart that compares the number of national parks in the eastern united states to that in the western states a study that proves adults who take yearly vacations have lower blood pressure than those who do not

In a painting about the horrors of war an artist shows the ruins a house. what is the subject of the painting

Based on the sentence, what does a studious effort require