Question

The nutrients in topsoil that support plant growth come from

Answer 1

The nutrients in topsoil that support plant growth come from plant and animal matter that is decaying.
When a plant or an animal is decaying, it releases nutrients which are beneficial for the soil. If the soil is healthy and thriving, it means that the new plants which are about to appear will grow more healthily and produce their 'goods.'

Answer 2

Answer:

The supplements in topsoil that help plant development come from plant and creature matter that is rotting.  

Explanation:

The supplements in topsoil that help plant development come from plant and creature matter that is rotting. At the point when a plant or a creature is rotting, it discharges supplements which are valuable for the dirt. On the off chance that the dirt is sound and flourishing, it implies that the new plants which are going to show up will develop all the more steadily and create their 'merchandise.'