Efforts to find the gene or genes that underlie bipolar disorder suggest that Multiple genes are involved. Bipolar disorder is a brain disorder that causes unusual shifts in mood, energy, activity levels, and the ability to carry out day-to-day tasks. These mood swings can affect sleep, energy, activity, judgement, behavior and the ability to think clearly.
You didn’t include the options
There is no specific answer to the meaning of life. The meaning of life, or the answer to the question pertains to the significance of living or existence in general. The question has many answers depending on who you ask.
My answer:
The meaning of life is overcoming struggles and triumph effortlessly, make strong bonds with people and make differences in their life, trying new things and shooting your shot until that ball goes through the hoop, and lastly doing what you love. Doing what makes you happy and smile!
As population density increases, competition increases because there are more organisms competing for the same number of resources