Question

dr. e. birde, journal of scientific bu. dr. birdes. dr. birde is now going to produce this formula for sale and advertise to customers that they see the same twenty - five percent increase in songbirds at their feeders. which might be a cause for the increase in songbirds at the feeders? the time of day that the birds were counted at the feeders the addition of dried apples and raisins to the formula the temperature changes each year the increased number of bird feeders

Explanation:

We are looking for a factor that could cause an increase in song - birds at feeders. Temperature changes, addition of food items, and number of feeders are more likely to directly affect bird populations. The time of day when counted is more about the method of data collection rather than a cause for the increase in the number of birds.

Answer:

the time of day that the birds were counted at the feeders