Hi, a warm welcome to the site :) biological could include hearing impairment, sight impairment, Downs's Syndrome and environmental could the setting and how it supports children's emergent maths eg. displays, resources, activities.
Page 238 of this EYE handbook looks at emergent mathematical skills
The role of the practitioner in supporting maths on page 244
Scaffolding children's mathematical learning & sustained shared thinking on page 245/6
Understanding how maths relates to children's everyday lives on page 239 and using mathematical language on page 249
Some of these pages are available to read in the amazon preview for example, if you search for 'concept and vocabulary' click the link to page 249 or 'biological' and the link to page 349
Hope this helps a little, please feel free to post whenever needed xx