Final answer:
Neptune is the planet with an active atmosphere and a highly inclined magnetic field similar to that of Uranus, known for its bright and dark clouds and for the Great Dark Spot, a dynamic weather feature.
Step-by-step explanation:
This planet is described as having an active atmosphere with bright and dark clouds and a highly inclined magnetic field similar to that of Uranus. Given the clues, the correct answer is d. Neptune. Neptune has a striking blue color caused by the absorption of red light by methane in its atmosphere and reflects back the blue light, making it appear blue. It also has active cloud patterns, second only to Jupiter, with bright and dark clouds visible. Moreover, Neptune's magnetic field is highly inclined, at about 55°, similar to Uranus' inclination of 60°.
Neptune is known for its Great Dark Spot, an anticyclonic storm similar to the Great Red Spot on Jupiter, demonstrating that Neptune has an active atmosphere with observable weather patterns. Unlike Uranus, which has a very stable and featureless atmosphere possibly due to the absence of a measurable internal heat source, Neptune has a dynamic atmosphere with visible structures in its cloud layers. The bright and dark clouds are part of the methane, hydrogen sulfide, and possibly other ice particle cloud layers that Neptune possesses.