What are the various types of heterotrophic nutrition?

The organisms $A$, $B$ and $C$ can obtain their food in three different ways. Organism $A$ derives its food from the body of another living organism which is called its $D$, without killing it. The organism $B$ takes in solid food by the process of ingestion, digests a part of this food and throws out undigested food in the process called $E$. The organism $C$ obtains its food from dead and decaying plants.
$(a)$ What is the mode of nutrition of $(i)$ organism $A$ (ii) organism $B$, and (iii) organism $C$?
$(b)$ What is the organism like $D$ called?
$(c)$ Name the process $E$.
$(d)$ Give one example each of organisms like $A$, $B$ and $C$.
$(e)$ What is the general name of the three modes of nutrition exhibited by organisms $A$, $B$ and $C$?

What are autotrophs? Give one example of autotrophs.

Name the various factors which affect the rate of photosynthesis in plants.

What is the name of the rhythmic muscular contraction and relaxation that moves food through the digestive tract?

What are pseudopodia?