Final answer:
Humans are uniquely capable of manipulating their own carrying capacity by employing various strategies such as agriculture and the domestication of animals. This conscious manipulation of environment enables the human population to grow, a trait not shared to the same degree with other species.
Step-by-step explanation:
The only organism that can manipulate their own carrying capacity is Humans. With their intelligence and societal structures, humans have the unique ability to alter their environment significantly. Techniques such as agriculture, domestication of animals, and the construction of shelters to protect from the elements have allowed humans to increase the amount of resources available, hence raising the carrying capacity of their environment. Not only do these practices allow for a growing population, but human societies also utilize language to communicate and transmit knowledge, further enhancing their capability to thrive and expand.
It is essential to note that while humans can increase their carrying capacity, there is also the potential for overexploitation, leading to environmental degradation, which could, in turn, decrease carrying capacity. However, when speaking of the capability to manipulate carrying capacity intentionally, humans stand out among other species. For example, even though beavers can change their environment by building dams, they do not have the same level of conscious manipulation over carrying capacity as humans do.
One of the ways humans have not increased the carrying capacity of their environment is through the use of language (option d), which is a tool for communication but does not directly affect the amount of available resources.