How do I determine which Python environment my Jupyter Notebook is using?

You can check the kernel used by your Jupyter Notebook by looking at the top-right corner of the notebook interface. It will display the kernel name (e.g., 'Python 3'). To confirm the environment, run `import sys; print(sys.executable)` in a code cell. This will print the path to the Python interpreter being used, allowing you to verify it's the correct environment where TensorFlow is installed.