Food chain levels OF consumers

The illustration represents a food chain. The consumers in the given food chain are labeled as

On an average 1/10 of the food eaten is turned into organism's own body and is available for the next level of consumer in a food chain. What fraction of the food eaten is not available for the next level?

At the trophic level of consumers, the rate at which food energy is assimilarted, is called ?

Food chains are very important for the survival of most species If Ravi is consuming curd/yogurt for lunch , which trophic level in a food chain he should be considered as occupying ?

Name the process in which a harmful chemical enters the food chain and gets concentrated at each level in the food chain.

Food chain || Trophic levels || Food web || 10% law OF flow OF energy