The geologic timescale details and divides geologic time based upon

Answer(a); // soil salinization and waterlogging;

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.

Light rain because storms had lightning and it started crops on fire or destroyed stuff