Different species vary - some spiders don't spin webs.. but it is not true that only female spiders spin webs - both male and female do - otherwise how would the male spiders catch their food?
no, they both make the same
not all spiders have the ability to build homes in their webs
no, but SPIDERS spin WEBS.
Spiders of both sexes spin webs.
Spiders make unique webs because they do not want other spiders coming into their webs. They have a unique shape, design, and scent to keep other away.
because they have some kind of oil inside them that helps them not stick because they have some kind of oil inside them that helps them not stick
Yes
Many spiders weave webs but not all do. Some spiders are ambush predators and do not build webs and still others actually chase their prey rather than relying on a web.
If by "redback spiders" you mean the kind of widow spiders that grow in Australia, they make the same kind of three-dimensional tangled filament webs that all the member of their Family make. Some other kinds of spiders make orb webs, sheet webs, etc.
No they come from almost all types of spiders.
Furrow spiders belong to the genus Larinioides.These spiders weave orb webs. No spiders that weave orb webs are dangerous to humans.