- Writing movement of the progress bar may be uneven because questions can be worth more or less (including zero) depending on your onswer You have been asked to write an essay about the layers of a rainforest ecosystem. Which of these is paragraph in this essay? O Rainforests are one of Earth's most precious ecosystems. The rainforest is full of life at every layer of its ecosystem O The emergent layer of the rainforest ecosystem gets the most sunlight. O There are four layers in a rainforest ecosystem: emergent, canopy, understory, and forest floor Submit Pass​