Which of the synonyms below would best describe scary, gorge or canyon in the earth's surface?
a: cave - a natural chamber in the earth
b: chasm - a deep crack in the surface of a planet
c: crater - a bowl shaped depression or dip in the earth
d: gulf - a wide gap

Type the correct answer in the box. spell all words correctly. certain species of insects introduced accidentally in a forest are destroying all the douglas fir trees in that forest. the wood of these trees is extensively used for construction. in order to control the damage caused by these insects, the forestry department decided to introduce the moth caterpillar in the forest. these caterpillars are natural predators of the insects. which method did the forestry department implement to control the invasive species? the forestry department implemented a(n) control method.