arrange these sentences: 1) can/e-books/benefits/readers/buying/enjoy/many/by.
2) leads/economic/unstable/to/a/country/situation/the/effects/in/often
3) growth/of/muscles/playing/bones/helps/the/lungs/sports/in/and/heart
4) fast food/several/eating/consequences/health/has/on.
5) to/go/because/some/school/have/children/do not/work/they/to.
6) sleeping/from/bedtime/adults/screen time/well/night/prevents/at/before.
7) main/genetics/of/is/obesity/the/one/causes/of​