'heighten the challenges' is correct and usable in written English.
You can use it to describe making a situation more difficult or complicated. For example: The teacher added additional questions to the exam, heightening the challenges for the students.
The divergent costumes of the women signal lifestyle shifts that now confront the Apa Tani just as climate change heightens the challenges facing their Himalayan paddy paradise.
There is a dearth of physicians who are experienced in treating people with autism, a factor that only heightens the challenges in treating these complex medical problems.
A substantial proportion of patients with ESRD are elderly and may have low educational attainment, poor health literacy and numeracy, and cognitive decline associated with their advancing kidney disease, heightening the challenges of educating patients about their RRT choices [ 15- 18].
The presence of jellyfish heightens the challenge for some jumpers.
The fight against humans rather than software sharpens the joy of battle, and coalition-building heightens the challenge.
Moreover, we surmised that the inherent fluidity of emerging RRI practices heightens the challenge incumbent structures pose to emerging RRI practices in action.
The advent of Google Inbox, which aims to elevate important emails and push down the rest, heightens the challenge and raises the cost of excessive emailing.
Political will drives pledging event Just as the troubled economy brings aid under greater scrutiny, it also heightens the challenge to secure adequate funding – a trend to which UNICEF is not immune.
The glucose addition was chosen to heighten the ethanol repression challenge to xylose utilization in order to detect isolates with the conserved reduced diauxy feature characteristic of the parent colony 5 (isolate 33) from which they arose, as well as general ethanol resistance to cell damage.
The renewed currency crisis also heightens the economic challenges facing President Mohamed Morsi as his administration tries to calm the panic caused by his move to push through a disputed new constitution in the face of widespread and passionate opposition.
