Question

is this convection, conduction or radiation?
radiation
convection
conduction

Explanation:

• Conduction is heat transfer through direct contact of materials. Here, there's no direct contact with the fire for conduction.
• Convection is heat transfer through the movement of fluids (liquids or gases). While air movement (a form of convection) might be around the fire, the primary way we feel heat from a fire from a distance is not mainly due to convection currents in the air being the dominant factor in the context of this question (which seems to focus on the main heat - transfer mode from the fire to a person not in direct contact and not in a situation where forced air movement is emphasized).
• Radiation is heat transfer in the form of electromagnetic waves (infra - red radiation in the case of heat from a fire). We can feel the heat from a fire without direct contact (no conduction) and without being in a situation where the main heat - carrying mechanism is the bulk movement of air (as in a strong convection current scenario). Fire emits thermal radiation (infra - red waves) that travel through the air (or vacuum, if there was a vacuum) to transfer heat.

Answer:

radiation