Answer:
My first is in some but not in all. My second is into but not in tall. My third in little but no in big. My fourth in port but not in pig. My whole is made in nature's way. For clothing, rugs used every day.
There are two bodies on the floor. They are surrounded by water and broken glass. How did they die?
When I get closer my tail grows longer, but when I go away my tail leads the way.
I'm not man's best friend, I'm their enemy, I can mark your end, yet you do not see me, I am very small, but very tough, If you have me, then you have it rough.
Sleeping during the day, I hide away. Watchful through the night, I open at dawn's light. But only for the briefest time, do I shine. And then I hide away. And sleep through the day.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.