The Relationship Between Intensity of Instagram Social Media Use and The Learning Environment with Student Concentration in Grade XI at SMA Negeri 9 Manado. Journal of Health Education and Behavior, [S. l.], v. 1, n. 2, p. 86–94, 2025. DOI: 10.47718/heb.v1i2.73. Disponível em: https://ejurnal.jurkeppolkesdo.my.id/index.php/HEB/article/view/73. Acesso em: 22 mar. 2026.