<span>the answer is an operating system</span>
Main Answer:<u> A Social networking service is an online platform that allow users to represent themselves via a profile and web site and provide and receive links to other network members </u>
Sub heding:
What is social networking service?
Explanation:
1.A social networking services is an online platform that allow users to represent themselves via a profile and web site and provide and receive links to other networks members
2.social networking services vary in format and the numbers of features
Reference link:
https//brainly.com
Hashtag:
#SPJ4
Answer:
Implicit type casting means the type casting done by the compiler during compilation of program whereas Explicit type casting means the programmer explicitly type casts the variables. This is the difference implicit and explicit type casting.
Explanation:
Type casting means the conversion of one data type into another data type. There are two types of type casting. They are Implicit type casting and Explicit type casting.
<u>Implicit type casting:</u> The type casting which is done by the compiler during the compilation of a program. This occurs when we assigning smaller data type to larger data type and also both the data type are compatible. Below example clears the above concepts.
Ex:

In the above example " i " is " int " data type whereas " l " is long data type but as we assigned the value of " i " to " l ". Here " int " and " long " are compatible data types and we assigned smaller data type ( int - i ) to larger data type ( long - l ) implicit type casting occurs.
<u>Explicit type casting:</u> The type casting which is done by the programmer explicitly to convert one data type into other data type. If we want to assign a value of larger data type to smaller data type explicit type casting is required. Below example clears the above concepts.
Ex: 

In the above example " d " is " double " data type whereas " l " is " long " data type. Here we are explicitly type casting to change larger data value ( double - d ) to smaller data value ( long - l ).
Answer:
the depth of the shaft,
the carrying load of the skip and the mass of the counterweight,
the approximate size of the winding drum,
the approximate height of the headgear and the sheave wheel