Question

Consider the statement:

Answer 1

The factors are
temperature of the land
ripening of oranges
evaporation of water
humidity of the surrounding air

Only one is a chemical property which is
ripening of oranges

The rest are physical properties or changes. So, the answer is 
A. 1

Answer 2

Answer:   A. 1

Explanation:

A physical change is defined as a change in physical properties of a matter such as shape , size and its state ( Solid , liquid or gas ).

This process is a reversible process.

On the other hand a chemical change is defined as a change in chemical properties of a matter such that its composition gets changed . This process is irreversible.

Given Factors : temperature  , ripening , evaporation , humidity

Here,

Physical changes are : temperature  , evaporation , humidity because they are reversible, they do not form a new substance.

But ripening of oranges is an irreversible process because its a chemical change in it which makes fruit more sweeter and softer.

Hence, there is only 1 factor which is a chemical change.