An injection of weakened bacteria that creates immunity to a disease.
Option c is the correct answer
Clastic sedimentary rocks
Most rocks that form from fragmental rock particles are classified as clastic sedimentary rocks.
Clastic sedimentary rocks are rocks that are formed by weathering processes due to exposure of pre-existing rocks to wind, ice, and water which breaks down the pre-exsiting rocks into chunks, pebble, sand, and smaller rock particles. Types of clastic sedimentary rocks include; conglomerate, breccia, shale and sandstone.
They would use a microscope to test it out.
