Read the excerpt from the text "Traveling to the Mauna Kea Observatory" and consider the words in bold.
Jack and Diane give fishing a whirl and amass quite a few reef triggerfish.

"I can't wait to go back home and show everyone all the fish we caught. I could probably make some money selling these colorful fish," Jack said.

"Our objective isn't to keep the fish," Diane says. "We are going to throw them back. That's part of being a responsible fisherman – a traveler! We don't take more than we need, and we don't need any."

The drive to the summit is a long one. They have to travel 4,200 meters up the dormant volcano to reach the observatory. Before they begin their arduous ascent, they decide to stop at the bottom of Mauna Kea and do some hiking. The lower slopes of the volcano are less hostile than the barren summit. For this reason, they're a popular destination for eco-travelers.

Jack and Diane tie up their hiking boots and take off on a hike. Along the way, they see a plethora of wildlife. They spot a Hawaiian Honeycreeper, a Palila, and even a Nene—the official state bird of Hawaii. Jack tells Diane that the Nene is a descendent of the Canadian goose and is the rarest goose in the world.

"Just like with the fish," Jack points out, "it's important that we don't interrupt the life of such a rare and majestic bird. Even though it would be so amazing to try and catch one, we don't need to. I'll just look at them through the binoculars." Diane smiles in agreement.

Select the strategy the author uses in this excerpt to develop the theme: be respectful and responsible when visiting a new destination.

Change in setting
Repeated words
Use of a symbol
Word choice