Land Use Change on Tenerife

Figure 1: Satellite images of Tenerife in 2002. 
Source: Landsat. 

1.	Mark on the above image the areas where land use change is most visible when comparing the classifications of 1978 and 2002 (see: landuse-c04-p02.html).
2.	What could be the reasons for these changes? Follow especially the progress of development: