You need an article before the singular noun "flower" (a flower, the flower). Or make it "flowers" (plural).
The food chain of the monarch butterfly is other flowers. Monarch Butterflies live off of nectar and water. They fly from flower to flower collecting nectar.
A butterfly sticks its long, slender, proboscis into the stamen of a flower, thus accessing the nectar, and drinks it.
Butterflies drink flower nectar. In fact, the only thing most butterflies ever eat is nectar from flowers.
the butterfly is flitting from flower to flower
it is the front wing of a grasshopper and butterflies
because the butterfly get nectar unto the flower
When a butterfly eats, the proboscis extends like a straw which they insert deep into the flower to suck up the nectar, a behavior called 'nectaring'. When eating they will circle around a flower for seconds at a time, making sure to drain all the nectar.
mutualism....
A butterfly uses it's mouth to eat nectar from the center of a flower. While eating, pollen gets on the butterfly's legs. When he travels to the next flower, the butterfly ends up inadvertently pollinating it.
A butterfly feeds mostly on nectar from flowers, and the pollen from the flower is distributed to other flowers by the butterfly. Symbiosis is the relationship between two different species of organisms that depend on each other; each gains benefits from the other in that the butterfly helps the flower reproduce, and the flower helps feed the butterfly.
Butterflies drink a flower's nectar from their straw-like tongue. they also eat sap.
Butterflies use almost any flower for nectar if they can get their proboscis into it. Some butterflies don't like nectar and prefer to drink from rotten fruit, puddles, or even feces. Of the butterflies that do prefer nectar, some preferred flower species (in the U.S. anyhow) are milkweed, joe pye weed, butterfly weed, butterfly bush, clovers, and thistle.