Answer:
The state that gained four seats in the House between 2000 and 2010 is Texas, which went from having 32 seats in 2000 to 36 in 2010, as a result of the huge increase of population that the state had during that period, going from having 20,851,820 inhabitants to 25,145,562 between those years.
In turn, the state of New York went from having 29 to 27 representatives, while the state of Ohio went from 18 to 16 representatives. This is because in both cases there was a decrease in the population of these states in relation to the total of the nation: in the case of New York, although its population between 2000 and 2010 rose by 500,000 inhabitants, the state as such happened to represent a lower percentage of the total population at the national level; while in the case of Ohio the same happened, with an increase of 700,000 inhabitants that still implied a percentage loss at the national level.
