What type of organism is always at the bottom of the trophic level?

the answer is a) a shiprock was formed by igneous process

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

explanation:

okay now i don't know this but for the pints nothing else to say bye

what are the options