Final answer:
The sky on Mars lights up with pink and purple during sunsets due to the scattering of sunlight and the red dust and iron oxide present in the Martian soil. option 4 is correct
Step-by-step explanation:
The sky on Mars lights up with pink and purple during sunsets.
On Earth, the Sun appears redder at sunset than it does at noon due to a phenomenon called reddening. When the Sun is lower in the sky, sunlight must travel through a longer path in the atmosphere, increasing the chance of scattering. Since red light is less likely to be scattered than blue light, the Sun appears more red as it approaches the horizon.
Similarly, on Mars, the sky appears pink and purple during sunsets due to the scattering of sunlight. The red dust and iron oxide present in the Martian soil contribute to the reddish hue of the sky. option 4 is correct