The following four, two-word  phrases can be anagrammed into four other two-word phrases, which will all have something in common.

BUSY ELK
TAMED ROOT
EGG SNARERS
CORN ALLEYWAY

Answers:

BUSY ELK - BLUE SKY
TAMED ROOT - RED TOMATO
EGG SNARERS - GREEN GRASS
CORN ALLEYWAY - YELLOW CANARY