What keyword can be used to create a named identifier for a memory location whose contents cannot change?

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

as many times as you want

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully