I don't know if their is sopposed to be options but my best educated guess is "Natural"
Answer:
Fungi are unicellular organisms eukaryotic organisms that includes microorganisms such as mushrooms, yeast, and molds.
Bacteria are group of single-cell microorganisms present in different shapes such as spirals, rods or spheres.
<em>Some of the fungi can causes disease and infection to humans same as bacteria.</em>
Fungi infects humans primarily through their skin. As fungi reproduce through spore formation often present in the air and soil and come in contact with human body surface which further multiply at body surface and infects human. Some of the fungal infections include ringworm, athlete's foot and jock itch.
Same as Fungi bacteria also enters into human body and multiply within the human cell causing human diseases such as tuberculosis, typhoid fever and cholera.
Heat from the earths core causes movement in the mantle, which results in movement on the crust.
