The correction option is VENTILATE THE AREA.
In order to reduce indoor air pollution, the best thing to do is to ventilate the area. Ventilation involves provision of fresh air into a room in order to flush out and eliminate indoor pollution.
This biome has a layer of soil that can either be sandy, gravelly, or stony, depending on the type of desert. Deserts usually get at most 50 centimeters (20 inches) of rainfall a year, and the organisms that live in deserts are adapted to this extremely dry climate. Plants in deserts have adaptations to conserve water.
The correct option is PHYLUM.
Scientists arranged living organisms into groups on the basis of the traits which they share with one another. The lowest rank in the groups is the specie while the kingdom is the highest rank. The ranks are arranged as follow:
Specie < Genus < Family < Order < Class < phylum < Kingdom.
Thus, the phylum is a combination of many classes.
