I need help please help me with this answer

What is the purpose of kings nobel peace prize acceptance speech

In which two sentences does the author use an ironic tone toward the subject

The difference between the present reservoir, with its silent sterile shores and debris-choked side canyons, and the original glen canyon, is the difference between death and life. glen canyon was alive. lake powell is a graveyard. which word best contributes to the author’s sad tone?