Final answer:
Regular physical activity has several positive effects on children, including increased bone and muscle strength, improved attention span, and enhanced social skills. option a, c and d.
Step-by-step explanation:
Regular physical activity has several positive effects on children. One of these effects is that it increases bone and muscle strength. Through physical activity, children put stress on their bones and muscles, which stimulates them to grow stronger over time.
Another positive effect is that it increases attention span. Engaging in regular physical activity helps children improve their focus and concentration, which can benefit their performance in school and other activities. Additionally, physical activity can also improve social skills.
Participating in group activities or team sports allows children to interact and collaborate with their peers, which can enhance their communication, teamwork, and relationship-building abilities.