Question

which tide is experienced when the earth, moon, and sun are in a line, allowing the moons and suns gravity to work together?
fortnightly tide
low tide
spring tide
high tide

Explanation:

When the Earth, Moon, and Sun are in a line (syzygy), the gravitational forces of the Moon and Sun combine. This results in higher high - tides and lower low - tides, known as spring tides. Fortnightly tide is a general term for tides that occur every two weeks (related to the lunar cycle but not specific to the alignment). Low tide and high tide are general terms for the water levels, but spring tide specifically refers to the tide when the three celestial bodies are aligned.

Answer:

spring tide