Which two factors allow this cattail population to thrive in its ecosystem? A. A harsh, cold climate
B. Nutrient-poor soil
OC. Adequate sunlight
D. Plentiful freshwater

To be honest i think its D because cattails need water.

Explanation:

preservation because he preserves part of the land and preserves means save

explanation:

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.