Refer to the figure, which shows a phylogenetic tree of the engrailed gene family. 
Which gene is the most closely related ortholog of human En1?
Definitions:
Christian Liberty
A theological and philosophical concept within Christianity that emphasizes freedom from sin and spiritual bondage, often interpreted as living under the grace of God rather than the strictures of law.
Religious Toleration
The acceptance of diverse religious beliefs and practices within a society, allowing individuals to follow their own faith without persecution.
Servitude
A condition in which an individual lacks liberty and is forced to work for another person, often without pay.
Magnetic Domains
A section within a magnetic material where atoms are aligned to produce a north or south polarity.
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