The study of organisms and the environment of an abandoned farmland is the Ecology of...

Explanation

Ecology is the study of living things and their environment. In this question, we are asked about the Ecology of an abandoned farmland. An abandoned farmland is an example of a habitat, which is a place where living things live. Ecology can be studied at different levels, such as an individual, a population, a community, or an ecosystem. A population refers to a group of individuals of the same species living in the same area, while a community refers to all the populations of different species living in the same area. An ecosystem refers to the interactions between living things and their environment, including non-living things such as water and soil. Therefore, the correct answer to this question is Option A: a community. This is because we are interested in the interactions between different populations of living things in the abandoned farmland, which is an example of a community. Option B (a population) and Option C (a species) are incorrect because they only refer to one type of living thing in the area. Option D (an ecosystem) is incorrect because it includes non-living things in addition to living things. It is important to study Ecology because it helps us understand how living things interact with each other and their environment. This knowledge can be used to manage and conserve natural resources, and to address environmental problems such as pollution and climate change.