Question

question #2
as the frequency decreases in an electromagnetic wave,
the wavelength increases.
the wavelength stays the same.
the wavelength doubles.
the wavelength decreases.
question #3
sound can be transmitted through all of the following, except
air
ground
water
space

Explanation:

For Question #2, the relationship between the frequency ($f$) and wavelength ($\lambda$) of an electromagnetic wave is given by $c = f\lambda$, where $c$ is the speed of light (constant in a vacuum). When $f$ decreases, $\lambda$ increases since $c$ is fixed.
For Question #3, sound is a mechanical wave that requires a medium to travel. Air, ground, and water are all mediums through which sound can travel, but space is a vacuum and sound cannot propagate through it.

Answer:

Question #2: The wavelength increases.
Question #3: Space