Nutrition in Plants

Can you give me a name?
Solve each of the following riddles by writing the name of
the organism and its mode of nutrition. One riddle is solved
to help you.
(a) I am tall but I cannot move. I am green and can prepare
my own food. tree, autotroph
(b) I live in water; people keep me in an aquarium and
feed me. ,
(c) I am small and I can fly. I disturb your sleep, bite you
and suck your blood which is my food.
,
(d) I am white and soft. I grow well in the rainy season.
Children pluck me from the ground and admire me. I
absorb nutrients from decomposed dead parts of
plants and animals in the soil. ,
.