If the wave speed stays the same, which of the following decreases as the frequency increases?

the first step is making objective observations.

they have to be based on a certain event and can be confirmed by others if it is right or not.

28. evolution

29. environment, survive, offspring  

explanation:

i'm on my way to history not a mistory.

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.