C, hydrogen bonds , i did this test last year and im in chemistry now, so its hydrogen bonds.
The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
So an object denser than water will sink
Additional component that you may use to attach yourself to the tree include:
1. Climbing belt which you will attach round the tree when climb up and when getting down.
2. Tree strap which you will use to strap yourself to the tree when you are on the tree stand.
3. Lifeline system: helps you to remain attached to the tree from the time you go up until you come down.
I dont get want you're trying to say
They make up structural parts of cell membranes
