A snail with its eyes infected with green-banded broodsac flatworm. A type of flatworm called the green-banded broodsac infects snails’ eyes, making the eyes look like caterpillars. This attracts birds that prey on caterpillars. Once a bird eats the snail, the green-banded broodsac matures and releases its eggs, which exit the bird’s body through its droppings.

What kind of relationship do snails and green-banded broodsacs share?

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Why is it important to study each branch of earth science?