In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

From what era, once thought devoid of animal life, was evidence of grazer populations discovered?, Context: Some paleontologists suggest that animals appeared much earlier than the Cambrian explosion, possibly as early as 1 billion years ago. Trace fossils such as tracks and burrows found in the Tonian period indicate the presence of triploblastic worms, like metazoans, roughly as large (about 5 mm wide) and complex as earthworms. During the beginning of the Tonian period around 1 billion years ago, there was a decrease in Stromatolite diversity, which may indicate the appearance of grazing animals, since stromatolite diversity increased when grazing animals went extinct at the End Permian and End Ordovician extinction events, and decreased shortly after the grazer populations recovered. However the discovery that tracks very similar to these early trace fossils are produced today by the giant single-celled protist Gromia sphaerica casts doubt on their interpretation as evidence of early animal evolution.
the Tonian period

What does Thapar decry as helping to put too much focus on certain aspects of Indian history?, Context: Romila Thapar notes that the division into Hindu-Muslim-British periods of Indian history gives too much weight to "ruling dynasties and foreign invasions", neglecting the social-economic history which often showed a strong continuity. The division into Ancient-Medieval-Modern periods overlooks the fact that the Muslim conquests occurred gradually during which time many things came and went off, while the south was never completely conquered. According to Thapar, a periodisation could also be based on "significant social and economic changes", which are not strictly related to a change of ruling powers.[note 1]
division into Hindu-Muslim-British periods

Which of the following is not a politician: Rajiv Gandhi, Huw Thomas, or Julius Vogel?, Context: Non-academic alumni: Author, H. G. Wells, McLaren and Ferrari Chief Designer, Nicholas Tombazis, CEO of Rolls Royce, Ralph Robins, rock band Queen, Brian May, CEO of Singapore Airlines, Chew Choon Seng, Prime Minister of New Zealand, Julius Vogel, Prime Minister of India, Rajiv Gandhi, Deputy Prime Minister of Singapore, Teo Chee Hean, Chief Medical Officer for England, Sir Liam Donaldson, Head Physician to the Queen, Huw Thomas, CEO of Moonfruit, Wendy Tan White, Businessman and philanthropist, Winston Wong, billionaire hedge fund manager Alan Howard.

Huw Thomas