Sympatric speciation is: . 1. initiated by the appearance of a geographic barrier 2. the process by which most animal species have evolved especially 3. important in the evolution of island species 4. the appearance of a new species in the same area

4. the appearance of a new species in the same area

Explanation:

A sympathetic specialization is the evolution of the new species from the survival ancestral species in the same geographical region and the terms represent the organisms whose ranges overlap and the occurs at least in some places and is also states the evolution of the biological species caused by the geographical isolation.

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].

Answerscripps institution of oceanography; i believe this is correct plz check first good luck;