Please capitalize where necessary: hash has no improving effect on performance and can reduce the ability to perform for up to a day after use because it is stored in the body’s fat deposits.
A: Hash has no improving effect on performance and can reduce the ability to perform for up to a day after use because it is stored in the body’s fat deposits.

Please capitalize where necessary: it is reported that more and more children is addicted to visiting porn websites and they often become social isolation and have mental illness.
A: It is reported that more and more children is addicted to visiting porn websites and they often become social isolation and have mental illness.

Please capitalize where necessary: we offer a wide variety of opportunities for participating in the volunteer groups, read more about it here
A: We offer a wide variety of opportunities for participating in the volunteer groups, read more about it here

Please capitalize where necessary: this year, it is really trendy to use materials like artificial furs, fleece or velvet.
A:
This year, it is really trendy to use materials like artificial furs, fleece or velvet.