Question

.why we sleep at only night​

Answer 1

Answer:

because we are feeling relax in night as compared to day ...

Answer 2

When you open your eyes in the morning, sunlight lets your brain know it is time to wake up.

As day turns to night, your brain makes a chemical called melatonin (mel-a-TONE-in) that makes you sleepy.

Because light can wake you up, your room should be dark when you sleep.

$</p><p></p><p><svg class="heart" viewBox="-2-2 98.6 90.81"></p><p></p><p><title>Corazon</title></p><p></p><p><text x=8 y=22 dx="0 0 0 0 0 0 0" dy="2-8-2 -1  1 2 4"style ="font:bold.7em arial; fill :orange;">ItzUnic0rns</p><p></p><p><tspan x=60 y=22 style="font: bold.7em arial; fill: blue;"> </tspan></p><p></p><p><tspan x=10 dy=15 style ="font: bold. 6em arial; fill: navy;"> </tspan></p><p></p><p><tspan x=25 dy=10 style ="font:bold. 6em arial; fill: gray;">Follow Me</tspan></p><p></p><p><tspan x=35 dy=10 style ="font:bold. 6em arial; fill: navy;"> </tspan></p><p></p><p><tspan x=37 dy=10 style ="font:bold. 5em arial; fill: silver;">♡♡</tspan></p><p></p><p><animate attibuteType="XML"</p><p>attributeName="visibility"from="visible" to="hidden"dur="9.2s" begin="0s"/></p><p></p><p></text></p><p></p><p><path stoke="firebrick" stroke-width="3" d="M86.81,8.1 5a27.79v,0, 0, 1,0, 39.33L47.48,86.81,8.15,47.48A27.81,27.81,0,0,1,47.48,8.15,27.79,27.79,0,0,1,86.81,8.1 5Z"/></p><p></p><p></avg></p><p></p><p><style></p><p></p><p>body {</p><p></p><p>display: grid;</p><p></p><p>min-height: 100vh;</p><p></p><p>justify-content: center;</p><p></p><p>align-content:center;</p><p></p><p>background: repeating-linear-gradient(circle, white, skyblue, pink);</p><p></p><p>background: repeating-radial-gradient(circle, white, skyblue, pink);</p><p></p><p>}</p><p></p><p>$