In this task you will be given a process, and a question. The process contains a sequence of steps that happen in order. The question asks about the effect of a certain event on another event. If the first event has a positive effect on the second event, answer with "for", if it has a negative effect, answer with "against". If there's no causal relationship between the two, answer with "none".

[EX Q]: Process:  -Iron is exposed to oxygen -Is exposed to air -A chemical reaction occurs -The iron starts to oxidize -The iron starts to rust.
 Question: What is the effect of bread is kept sealed tightly on iron is exposed to chemical reaction.?
[EX A]: none

[EX Q]: Process:  -A bird picks a spot high spot, often in a tree -The bird collects bits of sticks and grass -The sticks and grasses are placed between support branches -Leaves, mud and spider webs are added to the sticks -The mud, leaves and webs glue the sticks together -The solid nest supports the eggs -
 Question: What is the effect of the bird just found a nest on less or smaller nests.?
[EX A]: against

[EX Q]: Process:  -A plant grows near or on a rock -The plant roots begin to grow -Break apart the rock -The plant acids dissolve parts of the rock -The rocks are broken into more and more pieces -Erosion starts to occur.
 Question: What is the effect of plant roots will grow less on more or faster weathering occurring.?
[EX A]:
against