Is your DD very young? This looks like the 3-4 year old wppsi?
First - th eyounger a child the less accurate testing is as the closer they get to 'testable' boundaries. Don't assume this is a permanent picture.
Receptive vocab - child show 4 pictures on a page and asked to point at a named object (eg 'where's the snail?') tests comprehension of nouns at single word level. DD scaled score of 7 just below the average range and probably around 12th percentile.
Information - general knowledge, eg how old are you, what colour is grass. Obviously reliant on lang comprehension. DD score of 6 again rather below average range.
Picture naming - shown a picture, they have to say what it is eg a car, fork. Expressive vocabulary. DD's score of 5 below average.
These 3 would be summed together to make a verbal reasoning score which would be pretty low, I would guess around 5th to 10 th percentile, so at present she has a less well developed set of language reasoning skills than would be hoped. Development seems typical in that she understands more than she can say.
Object assembly - basically assembling jigsaws. her score of 10 is absolutely average for her age.
Block design - requires copying of towers, bridges etc modelled by the examiner. Crucially, requires the child to grasp that you want them to copy or build one 'the same', not add to yours or do what they want - so sometimes kids with poor language comprehension score lower not because they have poor spatial skills, but because they didn't understand what was required. I would check this with the EP before concluding anything about her spatial skills, given that her one word comprehension level isn't secure.
HTH!