Answer may be:

What is Biome?

Biome means a large community of plants, animals and organisms adapted to a particular kind of climate and physical features of that area. It is named according to the vegetation found in it for the ex-tropical forest, coniferous forest etc

Every biome is characterised by a distinct climate, so species that survive in that climate are found in that biome.

What is an Ecosystem?

The ecosystem is considered to be a part of the genome. It generally refers to how living and non-living components interact in that particular area.

Living components are called biotic which includes plants, animals and other organisms and non-living are called abiotic such as soil, water, temperature, climate etc. The biotic components interact among themselves like in a food chain and parasitism, symbiosis etcThis helps in maintaining  the flow of energy in the ecosystem

Biome vs Ecosystem