Question

species abundance:
click on the animal types that have increased since 2012 as a result of reducing ddt in the environment!
legend
1950 abundance
abundance at beginning of study (2012)
abundance at end of study (2022)
fish crabs pelicans insects
animal type
33 % (score)

Explanation:

To determine which animal types increased since 2012 (beginning of study, green bar) to 2022 (end of study, red bar), we compare the green (2012) and red (2022) bar heights for each animal:

• Fish: 2012 (green) ≈ 4, 2022 (red) ≈ 17 → Increased.
• Crabs: 2012 (green) ≈ 1, 2022 (red) ≈ 11 → Increased.
• Pelicans: 2012 (green) ≈ 1, 2022 (red) ≈ 9 → Increased.
• Insects: 2012 (green) ≈ 7, 2022 (red) ≈ 19 → Increased.

All (Fish, Crabs, Pelicans, Insects) show an increase from 2012 (green) to 2022 (red) as DDT reduction likely improved their populations.

Answer:

Fish, Crabs, Pelicans, Insects (all animal types in the graph show an increase from 2012 to 2022)