(a) Explain what is required in the diet of a man who does regular, hard, physical
work? [5]

At least 2 cups of fruits and 2½ cups of vegetables each day for vitamins, minerals, fiber and phytochemicals. Whole grains. Eat at least half of all grains as whole grains each day. ... At least 38 grams of fiber per day for younger men; 30 grams of fiber per day for men older than 50.

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.

the correct answer to this question is #5