The increase of certain types of gases in the
atmosphere has contributed to the problem of
global warming. all these gases are
(1) biotic factors
(2) abiotic factors
(3) organic factors
(4) endangered factors

Look at the illustration of four letters from the american manual alphabet. decide whether the description of the letter is a good definition. if not, choose a counterexample. the letter i is formed by sticking up the smallest finger and folding all the other fingers into the palm of your hand with the thumb folded over them while keeping your hand still.