What type of information is being presented by a scientist who has a reason for presenting information a certain way?

Which skill, if it cannot be performed by a 3-year-old child, should alert the nurse that the child may be developmentally delayed?

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?