Sparrow eats seeds. Afterwards, it eats insects. In which trophic level does the sparrow belong in both situations, respectively?

The world's most problematic aquatic weed is

In a food chain,humans cannot be placed in which of the following trophic levels?

In an ecosystem, at which trophic level can a human consuming curd be placed?

Consider the following four statements $(A-D)$ and select the correct option stating which ones are true $(T)$ and which ones are false $(F)$.
Statements:
$(A)$ Vertical distribution of different species occupying different levels in a community is called stratification.
$(B)$ Net primary productivity minus respiration losses is the gross primary productivity.
$(C)$ Rate of biomass production is called decomposition.
$(D)$ Annual net primary productivity of oceans is $55$ billion tons.

Identify the correct sequence of development of a stable community (climax community) starting from a new area (primary succession).