Located almost due east of the Reflecting Pool and the Lincoln Memorial, the monument, made of marble, granite, and bluestone gneiss, is both the world's tallest stone structure and the world's tallest obelisk, standing 554 feet 7 11⁄32 inches (169.046 m) tall according to the National Geodetic Survey
Answer:
you can heat gas in a very high temperture
I'm pretty sure it's the Eichhornia crassipes. It is a water hyacinth, and it was overgrown in the Lake Victoria area.
B. when limited resources cannot meet unlimited wants
Hope this helps :)