Answer:
there would be less birds.
Explanation:
If the population decreases the birds are dying. Therefore leaving the planet with less birds.
The right option is fatigue
<span>Fatigue is a feeling of tiredness, lack of
energy and motivation. Fatigue is a symptom of iron-deficiency anemia, which is
common in pregnancy. During pregnancy, hormonal changes such as increased
progesterone levels, physical changes and emotional changes occur in the body and
this can contribute to decreased energy resulting in fatigue.</span>
Gene, as such traits are passed down through genes
See a mental health counselor