OTTAWA—The president of Ukraine has thanked Canada for a $120-million loan aimed at bolstering his country’s economy amid a hostile buildup of 100,000 Russian troops and hundreds of tanks and armoured personnel carriers along its borders. Volodymyr Zelensky, through a statement issued late Friday by the Ukrainian Embassy in Ottawa, said the loan represents another example of the “special partnership” between the two countries. The brief statement, written by Andrii Bukvych, Ukraine’s charge d’affaires to Canada, said Ukraine is grateful to Canada for working with international partners to provide financial support, making it clear Russian aggression “is absolutely unacceptable.” “Contributing to Ukraine’s financial strength and resilience reinforces Canada’s firm political position in support of Ukraine,” Bukvych wrote. Outside of Ukraine and Russia, Canada has the world’s largest Ukrainian population at about 1.3 million inhabitants identifying as such for the 2016 census. Russia’s troop movements near Ukraine have prompted speculation across …