Ecological features of an organism refer to:

Ecological features of an organism encompass factors related to its ecological niche. This concept revolves around how an organism interacts with its environment, including its habitat, food sources, and role within its ecosystem. The ecological niche incorporates a wide range of biotic and abiotic factors, such as competition, predation, and resource availability, all of which define how the organism fits into its ecosystem. Understanding these features is essential for assessing how different species adapt to their environments and how they might respond to environmental changes.

Considering the other options, while reproductive behaviors can affect species survival and population dynamics, they do not comprehensively define an organism's ecological features. Physical traits, although relevant to adaptation and survival, pertain more to morphology rather than ecological interactions. The evolutionary history of a species is important for understanding its development over time but does not directly describe an organism's current ecological features. Hence, the option focusing on the ecological niche captures the essence of ecological features accurately.