Number the events (1-4) based on the order that they happened, with 1 being the first thing that happened and 4 being the last. Magma cut into the red-brown rocks and solidified to form glasslike rocks. Red-brown rocks with sand-sized rock grains were deposited horizontally. Rocks composed of gray clay flakes with crystals of minerals were deposited horizontally. Rocks made of shell and skeletons of marine organisms were deposited horizontally.
answer is
2
1
3
4