With rapid economic growth and urbanization, which of the following become a growing problem to pristine rainforest in Malaysia?

Since independence in 1957, Malaysia has been one of Asia’s success stories. Despite rapid economic growth and urbanization, the country remains home to large tracts of pristine rainforest.
     (6)Incursions by wildlife poachers from Thailand and Vietnam, however, are a growing problem.
     (7)Conservationists are adopting, and adapting, new technology to help save the country’s endangered species. Government rangers are on night patrol in Belum Tenegor forest—just 12 men protecting the rare elephants, tigers and bears that inhabit this 4,000-square-kilometer wilderness of northern Malaysia. " The proportion of elephants here is more female than male because of poaching. They kill the male because they want the tusk. So maybe only 10 to 15 percent are male. We are trying our best to overcome this problem," said Kadir Hashim, the director of state wildlife.