Log entries would be generated in two situations: at session initialization and at session close. At session initialization, the log entry would include details about the connection, such as the source and destination IP addresses, the service being used, and the action taken by the security policy.
At session close, the log entry would include details about the connection, such as the duration of the session, the bytes sent/received, and the action taken by the security policy.

Explanation
To create a security policy that will automatically add infected hosts to the infected hosts feed and block further communication through the SRX Series device, you need to add a security intelligence policy to the permit portion of the security policy. A security intelligence policy is a set of rules that defines the actions to be taken for traffic thatmatches a specific category of threat feeds, such as infected hosts, command and control servers, or botnets. By adding a security intelligence policy to the permit portion of the security policy, you can enable the SRX Series device to dynamically update the infected hosts feed based on the advanced anti-malware policy results, and block the traffic from or to the infected hosts. Options B, C, and D are not correct because they do not enable the automatic addition of infected hosts to the feed or the blocking of their communication. References: The answer can be verified from Juniper's official documentation on security intelligence and advanced anti-malware available on their website. Here are some relevant links:
Security Intelligence Feature Guide for Security Devices
Advanced Anti-Malware Feature Guide for Security Devices
Configuring Security Intelligence Policy on the SRX Series Device
[Configuring Advanced Anti-Malware Policy on the SRX Series Device]

The error message indicates that the Junos-http application is not defined, so you need to either create a custom application or modify the security policy to use the built-in Junos-http application.
Doing either of these will allow you to successfully commit the configuration.

1. Client protection proxy: This statement is correct because a forward proxy can also be called a client protection proxy since it protects the user's identity and computer information from the web server.
2. Server protection proxy: This statement is correct because a reverse proxy can also be called a server protection proxy since it protects the web server's identity and location from the user.