Which of the statements below best describes the relationship between elements of an ecosystem? a. elements of ecosystems are mutually dependent on each other. b. there is no relationship between elements within an ecosystem. c. abiotic elements are dependent on each other, while biotic elements are not dependent each other. d. a cause and effect relationship is limited to abiotic elements only.

When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.