I gave this another look, and I'm not finding the outrage.
Human body & development - they may not grasp it all, but you can give them an under 4y-old explanation of what the parts are. You do NOT have to explain the penis into vagina (or other variants) beyond 'the penis is where you pee', as that's all they need at that point.
Fertility & reproduction - they are going to ask, so you have to give an answer. What's outlined on the chart is age appropriate = babies come from mommy bellies. No details required, as that's typically enough to satisfy curiosity at that age.
Sexuality - do you believe you should twist a kid's head by saying they cannot or should-not touch themselves? Or is it better to give them a framework of 'it is okay to touch and explore your self and how it feels, just not for other to see or touch you (until <insert criteria of age, relationship status, etc>).
The last bit of 'physical closeness' is probably misplaced into sexuality, and unless framed in an appropriate setting (ie age, relationship status) if it IS in reference to sexuality, then it ought be framed in general 'relationships' like mom likes to be with baby, family bonding time (especially for small children and parents) in a non-sexual context.