A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.
_____________ is the number of individuals of the same species that have come into the habitat from elsewhere during the time period under consideration.
In the following question, sentence given with blank is to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option. If immigrants don't learn to speak the native languages of their new countries, they won't be able to _____________ themselves into society.