4. Which is the best expression of how scientists think of cause and effect? Everything is totally random.
Things happen all the time for no reason
Everything happens for a reason
It's impossible to decide what causes most phenomena in the universe.

a axis of a graph is a color or shade so we can all go outside and have a party so we can eat   some grilled cheese sammiches and broccoli and have some ugly fun times

i don't know why i put this, i know its not the i was just bored : p

delete this answer while you can

life would be meaningless without memes

i am sorry but i need more information and a picture.

it is a limiting nutrient limited by a single nutrient in the ecosystem, & the single goes very slow.