Uses it to debunk a sentimental icon of the West

1. Does the green section say that "the Russian Thistles leaving their roots and bouncing in the air comprise the weeds known as tumbleweed"?

2. Does the orange section mean "photographs that showed Russian thistles as the cause of drought"?

3. Does the red section mean "Russian thistle is known as a sentimental symbol of the west (specially in the cinema) but Miller's work changes this popular symbol and shows the other side of the coin that this thistle is the cause of blight and lack of biodiversity for over a century"?

Context:

Her 1997 work Russian Thistle Crisis, completed with Michael Honer, examined a chapter of botanical history in the US—the introduction of a non-native plant species to the American West, more specifically to South Dakota, during the nineteenth century by means of flax seed imported from Ukraine. Otherwise known as the source of the tumbleweed that has become an icon of the Western American frontier, the Russian thistle is an invasive weed that flourishes on barren stretches of land denuded of other vegetation and most wildlife. Through the use of documentary photographs that placed tumbleweed in this context for viewers, Miller’s work resituates the tumbleweed and uses it to debunk a sentimental icon of the West: the Russian thistle is more accurately a century-old symbol of blight and a lack of biodiversity.