Because if it weren’t tilted some place would have more sunlight
The answer to this question is active Genotype environment.
Active genotype environment interaction happen when a behavior from a certain individual will trigger responses from around that individual's environment. One example of this is when someone encourages her peers (her behavior will trigger other people to behave a certain way)
<span>In American politics, a "single-issue interest group" means an organization that is (or claims to be) devoted exclusively to advocating one particular position on one particular policy issue. An "organization" might be a non-profit or a non-governmental organization (NGO), or a labor union, or a trade association, or a concerned citizens' group. Single-issue groups usually claim to be non-partisan (i.e., they support initiatives regardless of whether Democrats or Republicans advance them).
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<span>There is an organ in the brain sensitive to light changes, which then affects our sleepiness.
This sensitivity to light changes will determine our response to melatonin that influences our level of 'tiredness'.
The more melatonin that we have in our body, the more likely we feel sleepy and fall asleep.</span>