The branch connected with characterisation, nomenclature, identification and classification is

The correct option is taxonomy.

Here is a step-by-step explanation of the biological terms provided in the options to understand why taxonomy is the correct branch:

1. Taxonomy is the branch of biology concerned with the classification, description, identification, and naming (nomenclature) of living organisms. It organizes organisms into hierarchical groups based on shared characteristics and evolutionary relationships.
2. Ecology is the study of how organisms interact with one another and with their physical environment.
3. Anatomy is the study of the bodily structure of humans, animals, and other living organisms, especially as revealed by dissection.
4. Morphology deals with the study of the form, shape, and external structure of organisms and their specific structural features.

Therefore, the scientific study that specifically deals with characterization, nomenclature, identification, and classification is taxonomy.