Ramy has displayed "The A-not-B error".
Children of 10 months or more youthful ordinarily make the perseveration mistake, which means they look under box "A" despite the fact that they saw the person move the toy under box "B", and box "B" is similarly as simple to reach. This shows an absence of, or fragmented, schema of object permanence.
Answer is in the file below
tinyurl.com/wpazsebu
1 ly is a distance, defined as the distance travelled by light in a year. hence 2.5 mn lys away means it takes 2.5mn years for light to reach earth b/c light travels a distance of 1 light year in a year
