Atlanta-based Bark, which uses machine learning to help parents monitor their children’s internet and social media habits, announced it has raised $9 million in a Series A round. The funding was led by Signal Peak Ventures, with participation from Two Sigma Ventures and existing investors, including Symmetrical Ventures, Fuel Capital, Hallett Capital and Atlanta Seed Company. The company, which was founded in 2015, previously raised $1.9 million in funding.