Larval

A)a juvenile form of an animal
B)a poison produced by an organism
C)to produce and give off a substance
D)a change in physical form and structure due to maturity
E)a worm-like amphibian that burrows in the soil

A) a juvenile form of an animal

Frogs and Toads need _____ for reproduction.

toxins
space
larva
water
gills

water

The correct option for the definition of "larval" is A) a juvenile form of an animal.

To arrive at this answer, you can break down the word and consider its common usage in biology.

1. Start with understanding the meaning of "larva." A larva is an immature form of an animal that goes through metamorphosis before becoming an adult. Larvae often look different from their adult counterparts and may have a distinct appearance and behavior.

2. The term "larval" is derived from "larva" and is used as an adjective to describe something related to or characteristic of a larva.

3. Out of the given options, B) "a poison produced by an organism," C) "to produce and give off a substance," and E) "a worm-like amphibian that burrows in the soil," do not align with the definition of "larval."

4. Option D) "a change in physical form and structure due to maturity" describes metamorphosis, which is a process that often accompanies the larval stage. However, option D) itself does not fully encompass the definition of "larval."

5. Finally, option A) "a juvenile form of an animal" accurately describes the meaning of "larval." It fits the common usage and scientific understanding of the term.

Therefore, the correct answer is A) a juvenile form of an animal.