Question

how do dead plants and animals contribute to replenishment of nutrients in soil short answer

Answer 1

As after their death, their body decomposes in the soil n provides nutrients to the soil

Answer 2

nutrients get into the soil many different ways from decomposed animal waste and get plants the atmosphere weathering of rocks and bacteria conversions when soil are used to keep grow food the soil need to be kept healthy as lot of nutrients when taken up by plants and not replaced