Concept:
Every economy performs certain essential economic activities to satisfy human wants and ensure economic development.
Step 1:
Production refers to the creation of goods and services required for human needs.
\[
A \text{ is correct}
\]
Step 2:
Consumption means the use of goods and services by individuals and society.
\[
B \text{ is correct}
\]
Step 3:
Investment helps in creating capital goods such as machinery, factories, and infrastructure for future production.
\[
C \text{ is correct}
\]
Step 4:
Providing government jobs to all citizens is not a compulsory activity of every economy because employment can also be generated by the private sector.
\[
D \text{ is incorrect}
\]
Step 5:
Thus, the necessary economic activities are:
\[
A,\ B,\ C \text{ Only}
\]
\[
\boxed{\text{(1) A, B, C Only}}
\]