Describe what would happen if we removed all the plants from a food chain

i need a good scientific long answer

Well if the planets were removed the pray would have no food to eat, because of this the food chain would most likely die out, or the pray would need to find a new location with materials they can consume.

Well If You Removed All The Plants From A Food Chain Then The Plant Would Either Adapt To New Changes And Thrive if You Move it Or If It Goes Extinct Then Well It Of Course Won't Survive And All Herbivores That Eat That Plant Would Either Have To Adapt And Find A New Food Source Or They Would Starve And Die And That Would Leave The Carnivores To Have To Leave Or Start Find New Prey Or They Too Will Die.