Final answer:
Brian Walker's blog post highlights the impact of climate change on polar bears, discussing the environmental changes caused by human activities.
Step-by-step explanation:
Based on the supplied information, what is one fact claimed by the internet blog post by Brian Walker? The correct response is that Brian Walker's blog post highlights the impact of climate change on polar bears. This is derived from the context provided where it's mentioned that the blog post discusses how human activity is transforming our planet's environment and specifically notes the increased rate of melting of the polar ice caps due to global warming. This melting affects polar bear habitats and is a direct consequence of climate change.
Brian Walker's blog post highlights the impact of climate change on polar bears. This fact is stated in option d) of the question. Climate change has been a significant threat to polar bears as it has led to the melting of their sea ice habitats, causing them to struggle to find food and affecting their overall survival.