Answer:
This question can not be answered. You did not give the poem name, so we have no idea what you want to know.
To make sure you get the answer right what are the poems you had to read by Woodsworth?
The population of Marsh grasses might increase if the population of Herons decrease because the herons use the marsh to live in and potentially eat. I hope this helps
18.7669° S and 46.8691° E. With a latitude in the south, Madagascar is a country that lies below the equator.