By Renju Jose SYDNEY (Reuters) – Early voting began in Australia on Monday two weeks ahead of election day, with surveys showing the opposition centre-left Labor Party extending its lead and Prime Minister Scott Morrison suffering a fall in his approval rating. Amid a campaign dominated by cost-of-living pressure, national security and climate change, a widely watched survey conducted for The Australian newspaper showed Labor leading 54%-46% on a two-party preferred basis against the Morrison-led Liberal Party-National Party coalition government. Morrison’s rating as the country’s preferred le…