Group 1 food crops
1.abandon
2.adversely
3.aggregate
4.cultivation
5.fertilize
6.intensify
7.irrigation
8.obtain
9.photosynthesis
10.precipitation
Group 2 disaster
1.anticipate
2.catastrophic
3.collide
4.eruption
5.famine
6.flood
7.impact
8.persevere
9.plunge
10.unleash
Group 3 evolution and migration
1.adapt
2.diverse