Read the following passage carefully and answer the question that follows.

High on the Changthang plateau of Ladakh, the village of Hanle has become the heart of India's first dark sky reserve. The site was chosen because the cold desert air above it is among the driest and clearest in the country, which is also why one of India's most important optical telescopes has operated on a hill nearby for years. Within the reserve, streetlights are shielded and point downwards, households have swapped harsh white bulbs for warm low intensity ones, and vehicles entering after dark are required to switch to low beam. The rules were written to protect the observatory's measurements, but they have also created an unexpected livelihood. About two dozen villagers, many of them women, have been trained as astronomy ambassadors: they operate small telescopes in their own courtyards and walk visitors through the winter constellations. Homestays that once shut after the short trekking season now report bookings deep into the freezing winter months, when the sky is at its clearest. Officials, however, are keeping the growth deliberate, capping the number of tourist vehicles each season, because unchecked traffic would bring back the very glow of light the reserve was created to remove.

In the passage, the statement that officials are keeping the growth 'deliberate' most nearly means that the growth is being kept