Answer:
The rock on the right is foliated.
Step-by-step explanation:
From the look, we can easily name the two rocks. These rocks are common metamorphic rocks. The rock on the right is a slate while the one on the left is quartzite.
From close observation, the slate is foliated and has a uniquely layered pattern. Foliation is a leaf-like appearance of metamorphic rocks and it is a result of metamorphic changes in a rock.
The protolith of quartzite is mostly sandstones which is a sedimentary rock.
The protolith of slate is also a sedimentary rock which are fined grained such as mudstone.