$A$ bear that eats a fish that further ate bugs that ate algae is a

Transfer of material and energy from one ecosystem to another ecosystem is best exemplified by:

Match the following:

Trophic levels	Examples
$A$. First	$a$. Man
$B$. Second	$b$. Wolf
$C$. Third	$c$. Cow
$D$. Fourth	$d$. Phytoplankton

$A$: Successional process starts only in those areas where no living organisms ever existed.
$R$: These areas are not supported by physical environmental conditions.

Ecological succession is a

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