>Why do [you] eat at a Table?
https://www.chabad.org/holidays/passover/pesach_cdo/aid/1486798/jewish/The-Four-Questions-Explained.htm
The Four Questions Explained
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On all nights we eat sitting upright or reclining, and on this night we all recline!
Tonight we all recline: Tonight, because of the intensity of the divine revelation that occurred on this night, and which reverberates each year, kulanu mesubin, we all recline—we are all imbued with an innate devotion to the divine. This fleeting revelation that overwhelms us on Passover gives us a jolt, a jump-start for the work of refining the “self” during the forty-nine days between Passover and Shavuot. (The Rebbe)10