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Course: Middle school biology - NGSS  > Unit 6

Lesson 1: Ecosystem dynamics
Science
Middle school biology - NGSS
Ecosystems and biodiversity
Ecosystem dynamics
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Problem

The graph below shows the size of a bird population over time.
A graph shows a line that represents bird population size over time. The line begins about a third of the way up the y-axis and goes to the right. The line goes up and down a little bit, but stays mostly steady.
One year, the amount of rainfall in the birds’ ecosystem was much higher than normal. This led to an increase in the amount of seeds available for the birds to eat.
Which of these graphs shows how the bird population likely changed as a result of the increased rain?
Choose 1 answer: