Final answer:
Option A: The Everglades are primarily threatened by habitat destruction and the modification of natural water flows due to human activities such as urban development and agriculture.
Step-by-step explanation:
The problems the Everglades face today can be predominantly attributed to habitat destruction and unsustainable resource use due to human activity. A few key factors include urban sprawl, agriculture, and the modification of water flow through activities such as damming rivers and rerouting to accommodate human development. These challenges, along with overharvesting and the introduction of non-native species, severely impact the biodiversity within this unique ecosystem.
These modifications have severe impacts on local ecosystems by disrupting or completely eliminating natural disturbances such as floods and fires, which many species rely on for survival. The introduction of non-native species, overharvesting, and other human-related activities exacerbate these challenges.
Efforts to mimic natural disturbances and restore habitats are critical, although this can be a long and complex process, especially if significant habitat loss has occurred. Even so, measures to restore and protect the Everglades are vital to the survival of the unique and diverse species that inhabit this ecosystem.