i think it's contact, dynamic, and regional
hope this helps
Answer:
Observers ahead of the wave observe an apparent increase in wave frequency
Explanation:
This is the Doppler Effect. The frequency of a wave increases when the source approaches the observer and decreases as the source recedes.
B, C, and D are wrong. Observers behind the source notice a decrease in frequency.
Yeast has many comercial uses in the production of breads, fuel, sodas, and wine.
The Answer D sound logical however I’m not sure about the 4 new chromosomes