The closure of the Strait of Hormuz has already driven up fuel prices across the region, and is expected to bring inevitable price hikes for food in Australia and beyond.World Vision is warning of knock-on effects for food security across Asia and the Pacific."If you look at a country like Papua New Guinea, where you already have high rates of child malnutrition and even stunting .. you can expect to see real impacts downstream on children and the most vulnerable," World Vision Australia CEO Grant Bayldon told SBS News."The impact of increased food prices, we expect, will be really significant across the region."Bayldon called on the Australian government to continue its "consistent positive presence in the Pacific" through its aid program."Our message to the government is that this isn't the time to abandon our neighbours when they need our help the most," he said