Which of the following statements are true? a. both viruses and bacteria are invisible to the naked eye. b-both viruses and bacteria grow in potentially hazardous foods. c. both viruses and bacteria create spores to them survive. d. thousands of viruses are required to cause a food-borne illness.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

if you listed your answers right then i believe your answer is b.