a behavioural stretegy of adaptation called echolocation is found in

1. biotic potential
2. maximum natatlity
3. ecological natality
4. reproductive potential

The correct answer is 1.
Biotic potential is the maximum reproductive capacity of a population under optimum environmental conditions. Full expression of the biotic potential of an organism is restricted by environmental resistance, any condition that inhibits the increase in number of the population. It is generally only reached when environmental conditions are very favorable. A species reaching its biotic potential would exhibit exponential population growth and be said to have a high fertility, that is, how many offspring are produced per mother.