BOTANY

Detailed explanation-1: -Species are already being impacted by anthropogenic climate change, and its rapid onset is limiting the ability of many species to adapt to their environments. Climate change currently affects at least 10, 967 species on the IUCN Red List of Threatened Species™, increasing the likelihood of their extinction.

Detailed explanation-2: -Habitat loss is the primary cause of higher extinction rates. Other causes include habitat changes, over-exploitation of wildlife for commercial purposes, the introduction of harmful nonnative species, pollution, and the spread of diseases.

Detailed explanation-3: -Thus it has become clear in recent years that most extinction is not background but rather is concentrated in regional or global events-often (at least in the case of the global events) called mass extinctions. Habitat destruction is the single leading cause of extinction.

Detailed explanation-4: -Dinosaurs, who were mesothermic animals-meaning they needed a warm climate to maintain body temperature and functionality of their metabolism, must have been severely impacted by this global cooling period.