how would the tides be different if the moon revolved around earth twice a month instead of once a month?
a) high and low tide would be more intense

b) there would be no change in the tide

c) there would be 4 spring tides and 4 neap tides a month instead of two

d) there would be 4 spring tides and no neap tide

The correct answer is C.

Neap tides are those tidal waves that have the smallest range between high tide and low tide and occur twice in a month.

Spring tides are the tidal waves that have the biggest range between high tide and low tide, and are also seen to occur twice a month.

If the moon revolved twice a month around the Earth, it would mean that the lunar cycle would be of 15 days -meaning 30 days/a month would incorporate two lunar cycles.  As the spring and neap tides occur twice each in one lunar cycle, they will occur four times in 30 days.