Sad caucasian adolescent sitting on sofa and holding smartphone in his hands at cozy home. Boy talking on video call online or webinar with friends on mobile phone. Serious child using smartphone listening music and watching video blog films cartoons online on laptop. Kid using technology. Screen time addiction. New generation z. Concept of e-learning learning online homeschool virtual school online education studying. Joyful Child resting relaxing looking at screen of gadget indoors.