What does '$X$' represent in the given graph?

Select the correct option from the following.

Read the following statements and select the correct option given below.
Statement-$I$: Announcing Kanha forest as a tiger reserve is called Ex situ conservation.
Statement-$II$: Wildlife safari parks and botanical gardens are examples of In situ conservation.

Match the category in Column-$I$ with their description in Column-$II$.

Column-$I$	Column-$II$
$i$. Extinct	$a$. Decline in species population from $50\%$ to $70\%$ over last $10$ years.
$ii$. Endangered	$b$. Species that are abundant.
$iii$. Vulnerable	$c$. Species of which its last individual has died.
$iv$. Least concern	$d$. Decline in species population from $30\%$ to $50\%$ over last $10$ years.

Categorize the following ecosystem services into the appropriate groups: Broadly Utilitarian vs. Narrowly Utilitarian.
$I-$ Industrial products
$II-$ Dyes
$III-$ Construction materials
$IV-$ Pollination
$V-$ Watching spring flowers in full bloom
$VI-$ Watching a bulbul bird in the morning
$VII-$ Lubricants
$VIII-$ Food
Select the correct sequence for (Narrowly Utilitarian,Broadly Utilitarian).

In the given graph,what does '$Y$' represent?