Population decreases by 15.
Birth rate means more population (positive), death rate means less population (negative), immigration means more (positive), and emigration means less (negative). So, just add and subtract the appropriate numbers:

Negative 15 people means that the population decreases by 15.
Energy is increases as frequency increases and wavelength decreases
Explanation:
The energy of wave is a function of its wavelength and frequency .
Wavelength is distance between two successive crests of a wave.
Frequency is the number of waves that passes a point per unit time.
Energy is directly proportional to the frequency of waves. The higher the frequency of waves the higher is its energy.
C = f ∧
C is the velocity of light
f is the frequency of wave
∧ is the wavelength of the wave
E = hf =
= hf
h is the planck's constant
learn more:
Electromagnetic radiation brainly.com/question/6818046
#learnwithBrainly
The main Function of the Bronchus is the passageway to the lungs and gets smaller the closer it gets to the tissue.