Please help me. I been stuck on this question for a long time :(

Explanation:

1. Climate change is caused by changes in the earth's atmosphere in the amounts of greenhouse gases released into the air. Some scientists believe that 100% of global warming is due to humans. The largest contribution comes from burning fossil fuels because it releases carbon dioxide gas to the air, which is done by humans. Other factors that contribute to climate change include:

>Deforestation- clearing out trees affects wildlife, ecosystems, whether patterns. Forests cover 30% of the lands mass and clearing them leaves many animals without homes.

>Waste from factories- they release tonnes of toxic fumes into the air.

> Agriculture and farming- this is a surprising contributing factor to global warming. Animals produce a greenhouse gas called methane and when livestock are grazed at a large scale, the amount of methane produced is a big contributor to global warming.

     Some fertilizers release nitrous oxide, which is another greenhouse gas.

2. The effects of global warming include:

    >Melting glaciers- this leaves many animals without homes and it also causes a rise in sea levels which causes flooding. (that's 3 effects)

    >Worsening droughts- this leaves many humans to die as they have no food or water.

    >Increasing tornadoes

okay that's all i could do... hope it helps.

the answer is d. chordata