4. describe the elements of the visual environment and how they affect health.

The elements of the visual environment and their affect on the health are:

Uses of the heavy metals in the environment are released into the soils from the landfills which contain the household waste and the industrial waste in the nature and it the by product of the mining ores.

Quality food production and the security of the food contain many components like production of the sufficient amount of the food and the contents in the food products.

answer; ///i believe )

the correct answers are:

a - pacific plate;

it is the biggest oceanic tectonic plate. surrounded on all sides by continental tectonic plates, it is submerging and gradually becoming smaller and smaller.

b - north american plate;

huge continental plate, occupying big portion of the northern hemisphere.

c -eurasian plate;

alongside the north american plate, it is one of the two dominant continental plates in the northern hemisphere.

d - indian plate;

a small continental plate, that has been part of gondwanaland initially, but after the break up of it, moved towards northeast and pushed into the eurasian plate that was once part of laurasia.