Spring tides:

a. happen twice a month
b. are caused by the gravitational pull of the sun and the moon
c. occurs when the earth, sun, and moon are aligned
d. all of the above

They also happen twice a month, and they occur when earth, sun and moon are alingned.

All of the above

Proof from my section))

Tides occurring during this condition are known as spring tides and happen when the moon phase is new (dark). At the time when the earth, moon, and sun form a right angle, the tide range is at its lowest level. These tides are called neap tides. A lunar month of 28 days consists of two spring tides and two neap tides.

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.

the answer is