Final answer:
The Correct option is 3). Not using the larvae/kg foliage scale might lead to incorrect conclusions about the relationship between larvae numbers and foliage, such as a constant larvae number, when in actuality it may vary with foliage density.
Step-by-step explanation:
If a worker did not use the scale from the axis labeled larvae/kg foliage, she might mistakenly conclude that the number of larvae is not related to foliage when, in fact, it is possible there could be a correlation. For example, if that worker observed a graph where the number of larvae appeared to be constant, she might erroneously deduce conclusion 3) The number of larvae is constant over time, without recognizing that the actual amount of foliage could be influencing the density of larvae per kilogram. It's crucial when interpreting data to use the correct scale on graphs to avoid such misinterpretations.