The picture below shows a mangrove ecosystem. In this ecosystem, pelicans nest in mangrove trees. Crabs consume mangrove leaf litter. Snails consume algae on mangrove roots.

How would a decrease in mangrove trees in this ecosystem affect the other living things there?

A. Snail, crab, and pelican populations would decrease.

B. Snail and crab populations would decrease while pelican populations would increase.

C. Pelican populations would decrease while snail and crab populations would increase.

D. Snail, crab, and pelican populations would increase.

A

Explanation:

if the mangrove trees population decreased then the animals that fly on the mangrove trees would go somewhere else to find somewhere to live so the population would decrease of all of the animals but use the mangrove trees

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.