Final answer:
The questions regarding the effects of deforestation on biodiversity and the impact of climate change on ecosystems are considered ecological. Ecology studies the interactions between organisms and their environments, focusing on issues like biodiversity and ecosystem health.
Step-by-step explanation:
The questions that would be considered ecological are "How does deforestation affect biodiversity?" and "How does climate change impact ecosystems?" These questions are ecological because they inquire about the relationships between organisms and their environments, which is the primary focus of ecology. In particular, they address the influences on biodiversity and ecosystems, which are central concerns in ecological research and conservation efforts. To better understand these questions, ecologists may study abiotic factors such as water quality, temperature, and pH levels in stream ecosystems, as well as biotic factors like the population of fish and aquatic plants. They also define benchmarks in ecology as reference points to assess ecological changes over time. Furthermore, water pollution's impact on diversity in streams and other effects of environmental changes are critical topics of ecological enquiry.