Understanding Causes of Endangered Species

The question asks us to identify the factors that contribute to plants and animals becoming vulnerable, endangered, or facing extinction. Let's analyze the given options:

Analyzing the Factors Affecting Species

• A. Afforestation: This involves planting trees and restoring forests. It is generally a positive activity that helps increase biodiversity, provides habitats for wildlife, and combats climate change. Therefore, afforestation is a conservation effort, not a cause of extinction.
• B. Landslides: While landslides are natural disasters, they can cause significant habitat destruction in affected areas. This destruction can displace or kill wildlife and damage plant life, potentially contributing to the vulnerability of local populations, especially when recovery is slow or impossible due to other pressures.
• C. Constructional activities: Human activities like building roads, dams, cities, and industries often lead to habitat destruction and fragmentation. This loss and fragmentation of natural environments force species to relocate, reduce their available resources, and can lead to population decline and endangerment.
• D. Poaching of animals: This refers to the illegal hunting and killing of animals. Poaching directly reduces animal populations, often targeting specific species for their valuable parts (like ivory, fur, or horns). This unsustainable removal of individuals can drive species towards extinction very rapidly.

Identifying Reasons for Extinction Risk

Based on the analysis:

• Landslides (B) can destroy habitats.
• Constructional activities (C) lead to habitat destruction and fragmentation.
• Poaching of animals (D) directly reduces populations.

These three factors (B, C, and D) are significant threats leading to species becoming vulnerable or endangered.

Afforestation (A) is a measure to *protect* species and habitats, not harm them.

Therefore, the correct combination of reasons from the options provided is B, C, and D.