Short Riddles and Answers

Question: I always wait unit you're off guard or get older so you can become easier to attack. Once your body is weak, I strike inside you and try to kill you. What am i

Question: I can be shared by many or spread to few, I am as fragile as silk yet as strong as steel. Wars have been fought in my name, generations defined by me. What am I?

Question: James found a little hamster on the floor. He then took pictures of it. Why when he go to the gallery in his phone, he only see his faces instead of the hamster.

Question: We are two separate things but very much alike. We can be life long or the lesson of your life. We grant you happiness but one may compromise. What are we?

Question: I have four wings, but cannot fly.
I never laugh and never cry;
On the same spot I'm always found, toiling away with a little sound.

What am I?