Fossilized poop of some of the huge and astonishing creatures that once roamedAustralia indicates their extinction around 45,000 year ago through likely causedby humans no climatic change a study has found. Research carried out byManosh University in Australia reveals the truth that human caused the extinctionsuch huge creature's scientists reconstructed the past climate and ecosystem bydrilling the Indian Ocean off coast of South West of Australia and analyzed thesemenis. The core contains chroniugical layers of materiais blown and washedinto the ocean, including dust, pollen, ash and spores from a fungus calledSporormella that thrived on dung of plant - eating mammals. The sediment coreallowed scientists to look back in time, in this case more than 1,50,000 yearswhich spanned Earth's last full glacial cycle, scientist established that more than85 percent of Australia's mammal, bird and reptiles weighing over 100 poundswent extinct shortly after the arrival of first humans. However there arecontradiction theories on the extinction of such large animals Scientists havebeen debating the causes of the Australian mega fauna extinctions for decades.Some claim the animals could not have survived changes in climate. Other havesuggested the animal were hunted to extinction by earliest Australian immigrants.Present finding throws some light on how human migration to the new iand couldhave caused the disaster of total extinction.mana) What could have caused the extinction of huge and astonishing creatures? b) How did scientists reconstruct the past climate and eco-system?c) What conclusion did the scientist come to?d) What is the controversy of the extinction of giant creatures?please give the answers of this passage​please tell this friends fast