### Instruction:

Extract the cause and effect entities from the following sentence:
Otherwise, weak WSN devices enable higher deployment densities and increase network lifetime as they are cheaper and consume less power

### Assistant:

CONDITION: consume less power
VARIABLE: they
CAUSE_1: weak WSN devices
EFFECT_1: enable higher deployment densities
AND: and
EFFECT_2: increase network lifetime
NOT_RELEVANT: Otherwise
KEYWORD: as
CAUSE_2: they are cheaper
CAUSE_3: consume less power

