Introduction:
The chip 74LS245 is a commonly used integrated circuit in digital electronics. It is an octal bus transceiver chip, which means it can transfer data bidirectionally between two buses. This chip is widely used in various applications, including microprocessors, data buses, and memory systems.

Explanation:
The chip 74LS245 has several features that make it suitable for its designated applications. Let's explore these features in detail:

1. Bidirectional Buffer:
The primary function of the 74LS245 chip is to act as a bidirectional buffer. It can transfer data bidirectionally between two buses, known as A and B. When the direction control pin (DIR) is set to HIGH, data is transferred from bus A to bus B, and when the DIR pin is set to LOW, data is transferred from bus B to bus A. This bidirectional capability allows efficient data transfer between different components of a digital system.

2. 8-bit Input Port:
The 74LS245 chip has 8 data input lines (D0-D7) that can be used as an 8-bit input port. These lines can receive data from external devices or other components of the system. The chip's bidirectional functionality allows it to receive data on these input lines and transfer it to the output lines or the other bus, depending on the direction control.

3. 8 Buffers:
The chip 74LS245 consists of 8 individual data buffers. Each buffer is responsible for isolating and driving a single data line. These buffers ensure that the input and output lines are properly controlled and do not interfere with each other. The buffers also provide the necessary driving capability to ensure reliable data transfer.

Conclusion:
In summary, the chip 74LS245 is a versatile component that serves as a bidirectional buffer, an 8-bit input port, and consists of 8 individual buffers. Its ability to transfer data bidirectionally between two buses, along with the presence of data input lines and individual buffers, makes it suitable for various applications in digital systems. Therefore, the correct answer to the given question is option 'D', which states that the chip 74LS245 possesses all of the mentioned features.