What is the mechanism that provides taxonomical information?

Out of the four statements $(1-4)$ given below,which two statements are correct regarding botanical gardens?
$(1)$ $A$ collection of plant specimens collected from various places.
$(2)$ Information for the identification of newly discovered plant specimens can be obtained.
$(3)$ $A$ planned collection of living plants for scientific purposes.
$(4)$ For the purpose of identification of various plant species.

Under whose supervision do zoological parks operate?

What kind of plants are grown in botanical gardens?

Match the following columns:

Column $I$	Column $II$
$1.$ $IABG$	$a.$ Herbarium
$2.$ $CZA$	$b.$ Botanical Garden
	$c.$ Museum
	$d.$ Zoological Park

What is the process of spraying specific chemicals on dried plant specimens for their preservation called?