Answer:
The title should be C: <em>Humanity Spreads: Air Pollution and Deforestation</em>
Explanation:
<em>"Humanity Spreads: Air Pollution and Deforestation"</em>
This tittle refers to how fast the population is growing in every aspect and how it is affecting natural resources. People keep moving to the cities looking for a job, studies, or a better life quality. As this happens, cities increase in size, which implies more human activity, more air pollution due to transport gas release, or factories gas release. Water is also polluted. Deforestation also increases because new buildings are constructed in new areas, or because agricultural activity keeps expanding to new places. Deforestation is the cause of death of so many species, not only plants but also animals that use to have shelter and food in this vegetation. By deforesting air quality is also affected as trees are not able to produce gas exchange.
Dugesia possess a central tubular digestive tract and this has three branches. These branches consist of ceca, which deliver nutrients to the body.
The order from smallest to largest would be:
H < C < N < O < Amino acid sequence < Globular Structure < Amino acid
The smallest should start from the elements. Among C, H, O and N, the lightest is the hydrogen, followed by carbon, nitrogen, then oxygen. You'll know this based on the periodic table. Next, is the amino acid sequence. This is the linear structure. Following is the globular structure which is the tertiary structure. The whole would be the amino acid.
<span>Gymnosperms are the first seed plants.</span>
