A careful preservation and protection od wildlife is the need of the hour.

Answer: Option C

One word substitute is Conservation.

Embarkment: the process of loading a passenger ship or an airplane with passengers or military personnel, related to and overlapping with individual boarding on aircraft and ships.
Promotion: activity that supports or encourages a cause, venture, or aim.
Conservation: preservation, protection, or restoration of the natural environment and of wildlife.
Management: the process of dealing with or controlling things or people.