What was the primary goal behind the launch of the 'Project Tiger' initiative in India?

The correct answer is Preserving tiger populations and protecting their natural ecosystems.

Project Tiger is a landmark wildlife conservation project launched by the Government of India in April 1973.
The central objective of the initiative is to ensure a viable and growing population of Bengal tigers in their natural habitats, safeguard them from poaching and habitat destruction, and preserve natural ecosystems representing the biological diversity of tiger reserves across the nation.

Analysis of Options:
- Facilitating the intercontinental translocation of leopard species: Project Tiger focuses on protecting native tiger populations within India rather than intercontinental translocations.
- Conserving coastal habitats and marine aquatic life: Project Tiger targets terrestrial forest and wetland ecosystems suitable for tigers, not marine or aquatic life.
- Encouraging Asiatic lion breeding programs inside dedicated reserves: Asiatic lions are conserved under distinct initiatives (such as Project Lion) primarily in the Gir ecosystem, separate from Project Tiger.
- Preserving tiger populations and protecting their natural ecosystems: This correctly captures the founding purpose and scope of Project Tiger.

Hence, the primary goal behind the launch of Project Tiger is the preservation of tiger populations and the protection of their natural ecosystems.